diff --git a/include/Nazara/Shader/Ast/AstCloner.hpp b/include/Nazara/Shader/Ast/AstCloner.hpp
index 8c77768f6..d4f5fc2c9 100644
--- a/include/Nazara/Shader/Ast/AstCloner.hpp
+++ b/include/Nazara/Shader/Ast/AstCloner.hpp
@@ -48,6 +48,7 @@ namespace Nz::ShaderAst
 			virtual ExpressionPtr Clone(SelectOptionExpression& node);
 			virtual ExpressionPtr Clone(SwizzleExpression& node);
 			virtual ExpressionPtr Clone(VariableExpression& node);
+			virtual ExpressionPtr Clone(UnaryExpression& node);
 
 			virtual StatementPtr Clone(BranchStatement& node);
 			virtual StatementPtr Clone(ConditionalStatement& node);
diff --git a/include/Nazara/Shader/Ast/AstNodeList.hpp b/include/Nazara/Shader/Ast/AstNodeList.hpp
index f16cdd9b5..47aa20c68 100644
--- a/include/Nazara/Shader/Ast/AstNodeList.hpp
+++ b/include/Nazara/Shader/Ast/AstNodeList.hpp
@@ -38,6 +38,7 @@ NAZARA_SHADERAST_EXPRESSION(IntrinsicExpression)
 NAZARA_SHADERAST_EXPRESSION(SelectOptionExpression)
 NAZARA_SHADERAST_EXPRESSION(SwizzleExpression)
 NAZARA_SHADERAST_EXPRESSION(VariableExpression)
+NAZARA_SHADERAST_EXPRESSION(UnaryExpression)
 NAZARA_SHADERAST_STATEMENT(BranchStatement)
 NAZARA_SHADERAST_STATEMENT(ConditionalStatement)
 NAZARA_SHADERAST_STATEMENT(DeclareExternalStatement)
diff --git a/include/Nazara/Shader/Ast/AstOptimizer.hpp b/include/Nazara/Shader/Ast/AstOptimizer.hpp
index 69092dcbf..8a60bce05 100644
--- a/include/Nazara/Shader/Ast/AstOptimizer.hpp
+++ b/include/Nazara/Shader/Ast/AstOptimizer.hpp
@@ -32,10 +32,12 @@ namespace Nz::ShaderAst
 		protected:
 			ExpressionPtr Clone(BinaryExpression& node) override;
 			ExpressionPtr Clone(ConditionalExpression& node) override;
+			ExpressionPtr Clone(UnaryExpression& node) override;
 			StatementPtr Clone(BranchStatement& node) override;
 			StatementPtr Clone(ConditionalStatement& node) override;
 
 			template<BinaryType Type> ExpressionPtr PropagateConstant(std::unique_ptr<ConstantExpression>&& lhs, std::unique_ptr<ConstantExpression>&& rhs);
+			template<UnaryType Type> ExpressionPtr PropagateConstant(std::unique_ptr<ConstantExpression>&& operand);
 
 		private:
 			std::optional<UInt64> m_enabledOptions;
diff --git a/include/Nazara/Shader/Ast/AstRecursiveVisitor.hpp b/include/Nazara/Shader/Ast/AstRecursiveVisitor.hpp
index ea605ff6a..c82c98ab6 100644
--- a/include/Nazara/Shader/Ast/AstRecursiveVisitor.hpp
+++ b/include/Nazara/Shader/Ast/AstRecursiveVisitor.hpp
@@ -32,6 +32,7 @@ namespace Nz::ShaderAst
 			void Visit(SelectOptionExpression& node) override;
 			void Visit(SwizzleExpression& node) override;
 			void Visit(VariableExpression& node) override;
+			void Visit(UnaryExpression& node) override;
 
 			void Visit(BranchStatement& node) override;
 			void Visit(ConditionalStatement& node) override;
diff --git a/include/Nazara/Shader/Ast/AstSerializer.hpp b/include/Nazara/Shader/Ast/AstSerializer.hpp
index 193f2f971..cbae0043f 100644
--- a/include/Nazara/Shader/Ast/AstSerializer.hpp
+++ b/include/Nazara/Shader/Ast/AstSerializer.hpp
@@ -35,6 +35,7 @@ namespace Nz::ShaderAst
 			void Serialize(SelectOptionExpression& node);
 			void Serialize(SwizzleExpression& node);
 			void Serialize(VariableExpression& node);
+			void Serialize(UnaryExpression& node);
 
 			void Serialize(BranchStatement& node);
 			void Serialize(ConditionalStatement& node);
diff --git a/include/Nazara/Shader/Ast/AstUtils.hpp b/include/Nazara/Shader/Ast/AstUtils.hpp
index 42d7254ab..501f6fb45 100644
--- a/include/Nazara/Shader/Ast/AstUtils.hpp
+++ b/include/Nazara/Shader/Ast/AstUtils.hpp
@@ -43,6 +43,7 @@ namespace Nz::ShaderAst
 			void Visit(SelectOptionExpression& node) override;
 			void Visit(SwizzleExpression& node) override;
 			void Visit(VariableExpression& node) override;
+			void Visit(UnaryExpression& node) override;
 
 			ExpressionCategory m_expressionCategory;
 	};
diff --git a/include/Nazara/Shader/Ast/Enums.hpp b/include/Nazara/Shader/Ast/Enums.hpp
index b4a7597a6..7e64589a8 100644
--- a/include/Nazara/Shader/Ast/Enums.hpp
+++ b/include/Nazara/Shader/Ast/Enums.hpp
@@ -29,7 +29,7 @@ namespace Nz::ShaderAst
 	enum class BinaryType
 	{
 		Add,       //< +
-		Subtract, //< -
+		Subtract,  //< -
 		Multiply,  //< *
 		Divide,    //< /
 
@@ -89,6 +89,13 @@ namespace Nz::ShaderAst
 		Third,
 		Fourth
 	};
+
+	enum class UnaryType
+	{
+		LogicalNot, //< !v
+		Minus,      //< -v
+		Plus,       //< +v
+	};
 }
 
 #endif // NAZARA_SHADER_ENUMS_HPP
diff --git a/include/Nazara/Shader/Ast/Nodes.hpp b/include/Nazara/Shader/Ast/Nodes.hpp
index 5fc836bef..37d80a9bd 100644
--- a/include/Nazara/Shader/Ast/Nodes.hpp
+++ b/include/Nazara/Shader/Ast/Nodes.hpp
@@ -176,6 +176,15 @@ namespace Nz::ShaderAst
 		std::size_t variableId;
 	};
 
+	struct NAZARA_SHADER_API UnaryExpression : public Expression
+	{
+		NodeType GetType() const override;
+		void Visit(AstExpressionVisitor& visitor) override;
+
+		UnaryType op;
+		ExpressionPtr expression;
+	};
+
 	// Statements
 
 	struct Statement;
diff --git a/include/Nazara/Shader/Ast/SanitizeVisitor.hpp b/include/Nazara/Shader/Ast/SanitizeVisitor.hpp
index da66ff277..9c9f79202 100644
--- a/include/Nazara/Shader/Ast/SanitizeVisitor.hpp
+++ b/include/Nazara/Shader/Ast/SanitizeVisitor.hpp
@@ -54,6 +54,7 @@ namespace Nz::ShaderAst
 			ExpressionPtr Clone(IntrinsicExpression& node) override;
 			ExpressionPtr Clone(SelectOptionExpression& node) override;
 			ExpressionPtr Clone(SwizzleExpression& node) override;
+			ExpressionPtr Clone(UnaryExpression& node) override;
 
 			StatementPtr Clone(BranchStatement& node) override;
 			StatementPtr Clone(ConditionalStatement& node) override;
diff --git a/include/Nazara/Shader/GlslWriter.hpp b/include/Nazara/Shader/GlslWriter.hpp
index ca6ca8112..6aa4c5117 100644
--- a/include/Nazara/Shader/GlslWriter.hpp
+++ b/include/Nazara/Shader/GlslWriter.hpp
@@ -86,6 +86,7 @@ namespace Nz
 			void Visit(ShaderAst::IntrinsicExpression& node) override;
 			void Visit(ShaderAst::SwizzleExpression& node) override;
 			void Visit(ShaderAst::VariableExpression& node) override;
+			void Visit(ShaderAst::UnaryExpression& node) override;
 
 			void Visit(ShaderAst::BranchStatement& node) override;
 			void Visit(ShaderAst::ConditionalStatement& node) override;
diff --git a/include/Nazara/Shader/LangWriter.hpp b/include/Nazara/Shader/LangWriter.hpp
index 2a111f47b..dbc0644de 100644
--- a/include/Nazara/Shader/LangWriter.hpp
+++ b/include/Nazara/Shader/LangWriter.hpp
@@ -85,6 +85,7 @@ namespace Nz
 			void Visit(ShaderAst::IntrinsicExpression& node) override;
 			void Visit(ShaderAst::SwizzleExpression& node) override;
 			void Visit(ShaderAst::VariableExpression& node) override;
+			void Visit(ShaderAst::UnaryExpression& node) override;
 
 			void Visit(ShaderAst::BranchStatement& node) override;
 			void Visit(ShaderAst::ConditionalStatement& node) override;
diff --git a/include/Nazara/Shader/ShaderBuilder.hpp b/include/Nazara/Shader/ShaderBuilder.hpp
index 434e05cfe..498dfa861 100644
--- a/include/Nazara/Shader/ShaderBuilder.hpp
+++ b/include/Nazara/Shader/ShaderBuilder.hpp
@@ -120,6 +120,11 @@ namespace Nz::ShaderBuilder
 		{
 			inline std::unique_ptr<ShaderAst::SwizzleExpression> operator()(ShaderAst::ExpressionPtr expression, std::vector<ShaderAst::SwizzleComponent> swizzleComponents) const;
 		};
+
+		struct Unary
+		{
+			inline std::unique_ptr<ShaderAst::UnaryExpression> operator()(ShaderAst::UnaryType op, ShaderAst::ExpressionPtr expression) const;
+		};
 	}
 
 	constexpr Impl::AccessMember AccessMember;
@@ -143,6 +148,7 @@ namespace Nz::ShaderBuilder
 	constexpr Impl::Return Return;
 	constexpr Impl::SelectOption SelectOption;
 	constexpr Impl::Swizzle Swizzle;
+	constexpr Impl::Unary Unary;
 }
 
 #include <Nazara/Shader/ShaderBuilder.inl>
diff --git a/include/Nazara/Shader/ShaderBuilder.inl b/include/Nazara/Shader/ShaderBuilder.inl
index 93287e2b6..194040b0e 100644
--- a/include/Nazara/Shader/ShaderBuilder.inl
+++ b/include/Nazara/Shader/ShaderBuilder.inl
@@ -235,6 +235,15 @@ namespace Nz::ShaderBuilder
 
 		return swizzleNode;
 	}
+
+	inline std::unique_ptr<ShaderAst::UnaryExpression> Impl::Unary::operator()(ShaderAst::UnaryType op, ShaderAst::ExpressionPtr expression) const
+	{
+		auto unaryNode = std::make_unique<ShaderAst::UnaryExpression>();
+		unaryNode->expression = std::move(expression);
+		unaryNode->op = op;
+
+		return unaryNode;
+	}
 }
 
 #include <Nazara/Shader/DebugOff.hpp>
diff --git a/include/Nazara/Shader/ShaderLangParser.hpp b/include/Nazara/Shader/ShaderLangParser.hpp
index 5baaf813a..4733b9eb0 100644
--- a/include/Nazara/Shader/ShaderLangParser.hpp
+++ b/include/Nazara/Shader/ShaderLangParser.hpp
@@ -96,9 +96,9 @@ namespace Nz::ShaderLang
 			// Expressions
 			ShaderAst::ExpressionPtr ParseBinOpRhs(int exprPrecedence, ShaderAst::ExpressionPtr lhs);
 			ShaderAst::ExpressionPtr ParseExpression();
-			ShaderAst::ExpressionPtr ParseFloatingPointExpression(bool minus = false);
+			ShaderAst::ExpressionPtr ParseFloatingPointExpression();
 			ShaderAst::ExpressionPtr ParseIdentifier();
-			ShaderAst::ExpressionPtr ParseIntegerExpression(bool minus = false);
+			ShaderAst::ExpressionPtr ParseIntegerExpression();
 			std::vector<ShaderAst::ExpressionPtr> ParseParameters();
 			ShaderAst::ExpressionPtr ParseParenthesisExpression();
 			ShaderAst::ExpressionPtr ParsePrimaryExpression();
diff --git a/include/Nazara/Shader/SpirvAstVisitor.hpp b/include/Nazara/Shader/SpirvAstVisitor.hpp
index b4dd9b8a7..5f52ac640 100644
--- a/include/Nazara/Shader/SpirvAstVisitor.hpp
+++ b/include/Nazara/Shader/SpirvAstVisitor.hpp
@@ -62,6 +62,7 @@ namespace Nz
 			void Visit(ShaderAst::ReturnStatement& node) override;
 			void Visit(ShaderAst::SwizzleExpression& node) override;
 			void Visit(ShaderAst::VariableExpression& node) override;
+			void Visit(ShaderAst::UnaryExpression& node) override;
 
 			SpirvAstVisitor& operator=(const SpirvAstVisitor&) = delete;
 			SpirvAstVisitor& operator=(SpirvAstVisitor&&) = delete;
diff --git a/src/Nazara/Graphics/Resources/Shaders/basicmaterial.frag.shader b/src/Nazara/Graphics/Resources/Shaders/basicmaterial.frag.shader
index dd4e62b97..90f866d0b 100644
Binary files a/src/Nazara/Graphics/Resources/Shaders/basicmaterial.frag.shader and b/src/Nazara/Graphics/Resources/Shaders/basicmaterial.frag.shader differ
diff --git a/src/Nazara/Graphics/Resources/Shaders/basicmaterial.frag.shader.h b/src/Nazara/Graphics/Resources/Shaders/basicmaterial.frag.shader.h
index edc400886..d0446fabc 100644
--- a/src/Nazara/Graphics/Resources/Shaders/basicmaterial.frag.shader.h
+++ b/src/Nazara/Graphics/Resources/Shaders/basicmaterial.frag.shader.h
@@ -1 +1 @@
-78,83,72,82,0,0,0,1,0,0,0,21,0,0,0,10,0,0,0,16,0,0,0,0,19,72,65,83,95,68,73,70,70,85,83,69,95,84,69,88,84,85,82,69,1,0,0,0,0,255,255,255,255,0,0,0,16,0,0,0,0,17,72,65,83,95,65,76,80,72,65,95,84,69,88,84,85,82,69,1,0,0,0,0,255,255,255,255,0,0,0,16,0,0,0,0,10,65,76,80,72,65,95,84,69,83,84,1,0,0,0,0,255,255,255,255,0,0,0,17,0,0,0,0,13,66,97,115,105,99,83,101,116,116,105,110,103,115,1,0,0,0,1,0,0,0,2,0,0,0,14,65,108,112,104,97,84,104,114,101,115,104,111,108,100,1,0,0,0,1,0,0,0,0,12,68,105,102,102,117,115,101,67,111,108,111,114,7,0,0,0,4,0,0,0,1,0,0,0,0,17,0,0,0,0,12,73,110,115,116,97,110,99,101,68,97,116,97,1,0,0,0,1,0,0,0,2,0,0,0,11,119,111,114,108,100,77,97,116,114,105,120,3,0,0,0,4,0,0,0,4,0,0,0,1,0,0,0,0,14,105,110,118,87,111,114,108,100,77,97,116,114,105,120,3,0,0,0,4,0,0,0,4,0,0,0,1,0,0,0,0,17,0,0,0,0,10,86,105,101,119,101,114,68,97,116,97,1,0,0,0,1,0,0,0,9,0,0,0,16,112,114,111,106,101,99,116,105,111,110,77,97,116,114,105,120,3,0,0,0,4,0,0,0,4,0,0,0,1,0,0,0,0,19,105,110,118,80,114,111,106,101,99,116,105,111,110,77,97,116,114,105,120,3,0,0,0,4,0,0,0,4,0,0,0,1,0,0,0,0,10,118,105,101,119,77,97,116,114,105,120,3,0,0,0,4,0,0,0,4,0,0,0,1,0,0,0,0,13,105,110,118,86,105,101,119,77,97,116,114,105,120,3,0,0,0,4,0,0,0,4,0,0,0,1,0,0,0,0,14,118,105,101,119,80,114,111,106,77,97,116,114,105,120,3,0,0,0,4,0,0,0,4,0,0,0,1,0,0,0,0,17,105,110,118,86,105,101,119,80,114,111,106,77,97,116,114,105,120,3,0,0,0,4,0,0,0,4,0,0,0,1,0,0,0,0,16,114,101,110,100,101,114,84,97,114,103,101,116,83,105,122,101,7,0,0,0,2,0,0,0,1,0,0,0,0,19,105,110,118,82,101,110,100,101,114,84,97,114,103,101,116,83,105,122,101,7,0,0,0,2,0,0,0,1,0,0,0,0,11,101,121,101,80,111,115,105,116,105,111,110,7,0,0,0,3,0,0,0,1,0,0,0,0,14,0,0,0,0,6,0,0,0,10,118,105,101,119,101,114,68,97,116,97,6,0,0,0,10,86,105,101,119,101,114,68,97,116,97,1,0,0,0,5,0,0,0,12,105,110,115,116,97,110,99,101,68,97,116,97,6,0,0,0,12,73,110,115,116,97,110,99,101,68,97,116,97,1,0,0,0,4,0,0,0,8,115,101,116,116,105,110,103,115,6,0,0,0,13,66,97,115,105,99,83,101,116,116,105,110,103,115,1,0,0,0,3,0,0,0,16,77,97,116,101,114,105,97,108,65,108,112,104,97,77,97,112,4,0,0,0,2,0,0,0,1,1,0,0,0,0,0,0,0,18,77,97,116,101,114,105,97,108,68,105,102,102,117,115,101,77,97,112,4,0,0,0,2,0,0,0,1,1,0,0,0,1,0,0,0,14,84,101,120,116,117,114,101,79,118,101,114,108,97,121,4,0,0,0,2,0,0,0,1,1,0,0,0,2,0,0,0,17,0,0,0,0,9,73,110,112,117,116,68,97,116,97,0,0,0,0,2,0,0,0,10,118,101,114,116,78,111,114,109,97,108,7,0,0,0,3,0,0,0,1,2,0,0,0,0,0,0,0,6,118,101,114,116,85,86,7,0,0,0,2,0,0,0,1,2,0,0,0,1,0,0,0,17,0,0,0,0,10,79,117,116,112,117,116,68,97,116,97,0,0,0,0,1,0,0,0,13,82,101,110,100,101,114,84,97,114,103,101,116,48,7,0,0,0,4,0,0,0,1,2,0,0,0,0,0,0,0,15,0,0,0,4,109,97,105,110,2,0,0,0,10,79,117,116,112,117,116,68,97,116,97,1,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,5,105,110,112,117,116,2,0,0,0,9,73,110,112,117,116,68,97,116,97,0,0,0,8,0,0,0,18,0,0,0,0,6,111,117,116,112,117,116,2,0,0,0,10,79,117,116,112,117,116,68,97,116,97,255,255,255,255,0,0,0,18,0,0,0,0,8,108,105,103,104,116,68,105,114,0,0,0,0,6,0,0,0,5,0,0,0,0,191,52,253,244,63,52,253,244,0,0,0,18,0,0,0,0,11,108,105,103,104,116,70,97,99,116,111,114,0,0,0,0,8,0,0,0,1,0,0,0,2,0,0,0,0,0,0,0,7,0,0,0,5,105,110,112,117,116,0,0,0,1,0,0,0,10,118,101,114,116,78,111,114,109,97,108,0,0,0,7,0,0,0,8,108,105,103,104,116,68,105,114,0,0,0,18,0,0,0,0,12,116,101,120,116,117,114,101,67,111,108,111,114,0,0,0,0,3,0,0,0,2,0,0,0,7,0,0,0,11,108,105,103,104,116,70,97,99,116,111,114,0,0,0,9,0,0,0,19,72,65,83,95,68,73,70,70,85,83,69,95,84,69,88,84,85,82,69,0,0,0,3,0,0,0,2,0,0,0,8,0,0,0,2,0,0,0,2,0,0,0,7,0,0,0,18,77,97,116,101,114,105,97,108,68,105,102,102,117,115,101,77,97,112,0,0,0,0,0,0,0,7,0,0,0,5,105,110,112,117,116,0,0,0,1,0,0,0,6,118,101,114,116,85,86,0,0,0,0,0,0,0,7,0,0,0,8,115,101,116,116,105,110,103,115,0,0,0,1,0,0,0,12,68,105,102,102,117,115,101,67,111,108,111,114,0,0,0,0,0,0,0,7,0,0,0,8,115,101,116,116,105,110,103,115,0,0,0,1,0,0,0,12,68,105,102,102,117,115,101,67,111,108,111,114,0,0,0,18,0,0,0,0,4,118,97,114,48,0,0,0,0,9,0,0,0,17,72,65,83,95,65,76,80,72,65,95,84,69,88,84,85,82,69,0,0,0,4,7,0,0,0,4,0,0,0,1,0,0,0,10,0,0,0,1,0,0,0,7,0,0,0,12,116,101,120,116,117,114,101,67,111,108,111,114,0,0,0,0,0,0,0,10,0,0,0,1,0,0,0,7,0,0,0,12,116,101,120,116,117,114,101,67,111,108,111,114,0,0,0,1,0,0,0,10,0,0,0,1,0,0,0,7,0,0,0,12,116,101,120,116,117,114,101,67,111,108,111,114,0,0,0,2,0,0,0,3,0,0,0,2,0,0,0,10,0,0,0,1,0,0,0,8,0,0,0,2,0,0,0,2,0,0,0,7,0,0,0,16,77,97,116,101,114,105,97,108,65,108,112,104,97,77,97,112,0,0,0,0,0,0,0,7,0,0,0,5,105,110,112,117,116,0,0,0,1,0,0,0,6,118,101,114,116,85,86,0,0,0,0,0,0,0,10,0,0,0,1,0,0,0,7,0,0,0,12,116,101,120,116,117,114,101,67,111,108,111,114,0,0,0,3,0,0,0,7,0,0,0,12,116,101,120,116,117,114,101,67,111,108,111,114,0,0,0,12,0,0,0,1,0,0,0,3,0,0,0,4,0,0,0,9,0,0,0,10,65,76,80,72,65,95,84,69,83,84,0,0,0,3,0,0,0,8,0,0,0,10,0,0,0,1,0,0,0,7,0,0,0,4,118,97,114,48,0,0,0,3,0,0,0,0,0,0,0,7,0,0,0,8,115,101,116,116,105,110,103,115,0,0,0,1,0,0,0,14,65,108,112,104,97,84,104,114,101,115,104,1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\ No newline at end of file
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diff --git a/src/Nazara/Graphics/Resources/Shaders/basicmaterial.vert.shader b/src/Nazara/Graphics/Resources/Shaders/basicmaterial.vert.shader
index 7d3e4d2b8..d5e37d6b6 100644
Binary files a/src/Nazara/Graphics/Resources/Shaders/basicmaterial.vert.shader and b/src/Nazara/Graphics/Resources/Shaders/basicmaterial.vert.shader differ
diff --git a/src/Nazara/Graphics/Resources/Shaders/basicmaterial.vert.shader.h b/src/Nazara/Graphics/Resources/Shaders/basicmaterial.vert.shader.h
index 07d92a859..49b59e099 100644
--- a/src/Nazara/Graphics/Resources/Shaders/basicmaterial.vert.shader.h
+++ b/src/Nazara/Graphics/Resources/Shaders/basicmaterial.vert.shader.h
@@ -1 +1 @@
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\ No newline at end of file
+78,83,72,82,0,0,0,1,0,0,0,22,0,0,0,7,0,0,0,18,0,0,0,0,13,66,97,115,105,99,83,101,116,116,105,110,103,115,1,0,0,0,1,0,0,0,2,0,0,0,14,65,108,112,104,97,84,104,114,101,115,104,111,108,100,1,0,0,0,1,0,0,0,0,12,68,105,102,102,117,115,101,67,111,108,111,114,7,0,0,0,4,0,0,0,1,0,0,0,0,18,0,0,0,0,12,73,110,115,116,97,110,99,101,68,97,116,97,1,0,0,0,1,0,0,0,2,0,0,0,11,119,111,114,108,100,77,97,116,114,105,120,3,0,0,0,4,0,0,0,4,0,0,0,1,0,0,0,0,14,105,110,118,87,111,114,108,100,77,97,116,114,105,120,3,0,0,0,4,0,0,0,4,0,0,0,1,0,0,0,0,18,0,0,0,0,10,86,105,101,119,101,114,68,97,116,97,1,0,0,0,1,0,0,0,9,0,0,0,16,112,114,111,106,101,99,116,105,111,110,77,97,116,114,105,120,3,0,0,0,4,0,0,0,4,0,0,0,1,0,0,0,0,19,105,110,118,80,114,111,106,101,99,116,105,111,110,77,97,116,114,105,120,3,0,0,0,4,0,0,0,4,0,0,0,1,0,0,0,0,10,118,105,101,119,77,97,116,114,105,120,3,0,0,0,4,0,0,0,4,0,0,0,1,0,0,0,0,13,105,110,118,86,105,101,119,77,97,116,114,105,120,3,0,0,0,4,0,0,0,4,0,0,0,1,0,0,0,0,14,118,105,101,119,80,114,111,106,77,97,116,114,105,120,3,0,0,0,4,0,0,0,4,0,0,0,1,0,0,0,0,17,105,110,118,86,105,101,119,80,114,111,106,77,97,116,114,105,120,3,0,0,0,4,0,0,0,4,0,0,0,1,0,0,0,0,16,114,101,110,100,101,114,84,97,114,103,101,116,83,105,122,101,7,0,0,0,2,0,0,0,1,0,0,0,0,19,105,110,118,82,101,110,100,101,114,84,97,114,103,101,116,83,105,122,101,7,0,0,0,2,0,0,0,1,0,0,0,0,11,101,121,101,80,111,115,105,116,105,111,110,7,0,0,0,3,0,0,0,1,0,0,0,0,15,0,0,0,0,3,0,0,0,10,118,105,101,119,101,114,68,97,116,97,6,0,0,0,10,86,105,101,119,101,114,68,97,116,97,1,0,0,0,5,0,0,0,12,105,110,115,116,97,110,99,101,68,97,116,97,6,0,0,0,12,73,110,115,116,97,110,99,101,68,97,116,97,1,0,0,0,4,0,0,0,8,115,101,116,116,105,110,103,115,6,0,0,0,13,66,97,115,105,99,83,101,116,116,105,110,103,115,1,0,0,0,3,0,0,0,18,0,0,0,0,9,73,110,112,117,116,68,97,116,97,0,0,0,0,3,0,0,0,5,105,110,80,111,115,7,0,0,0,3,0,0,0,1,2,0,0,0,0,0,0,0,9,105,110,78,111,114,109,97,108,115,7,0,0,0,3,0,0,0,1,2,0,0,0,1,0,0,0,10,105,110,84,101,120,67,111,111,114,100,7,0,0,0,2,0,0,0,1,2,0,0,0,2,0,0,0,18,0,0,0,0,10,79,117,116,112,117,116,68,97,116,97,0,0,0,0,3,0,0,0,10,118,101,114,116,78,111,114,109,97,108,7,0,0,0,3,0,0,0,1,2,0,0,0,0,0,0,0,6,118,101,114,116,85,86,7,0,0,0,2,0,0,0,1,2,0,0,0,1,0,0,0,8,112,111,115,105,116,105,111,110,7,0,0,0,4,0,0,0,1,1,0,0,0,0,0,0,0,0,16,0,0,0,4,109,97,105,110,2,0,0,0,10,79,117,116,112,117,116,68,97,116,97,1,0,0,0,1,0,0,0,0,0,0,0,0,0,1,0,0,0,5,105,110,112,117,116,2,0,0,0,9,73,110,112,117,116,68,97,116,97,0,0,0,5,0,0,0,19,0,0,0,0,6,111,117,116,112,117,116,2,0,0,0,10,79,117,116,112,117,116,68,97,116,97,255,255,255,255,0,0,0,21,0,0,0,2,0,0,0,0,0,0,0,0,0,0,0,7,0,0,0,6,111,117,116,112,117,116,0,0,0,1,0,0,0,6,118,101,114,116,85,86,0,0,0,0,0,0,0,7,0,0,0,5,105,110,112,117,116,0,0,0,1,0,0,0,10,105,110,84,101,120,67,111,111,114,100,0,0,0,21,0,0,0,2,0,0,0,0,0,0,0,0,0,0,0,7,0,0,0,6,111,117,116,112,117,116,0,0,0,1,0,0,0,10,118,101,114,116,78,111,114,109,97,108,0,0,0,0,0,0,0,7,0,0,0,5,105,110,112,117,116,0,0,0,1,0,0,0,9,105,110,78,111,114,109,97,108,115,0,0,0,21,0,0,0,2,0,0,0,0,0,0,0,0,0,0,0,7,0,0,0,6,111,117,116,112,117,116,0,0,0,1,0,0,0,8,112,111,115,105,116,105,111,110,0,0,0,3,0,0,0,2,0,0,0,3,0,0,0,2,0,0,0,3,0,0,0,2,0,0,0,0,0,0,0,7,0,0,0,10,118,105,101,119,101,114,68,97,116,97,0,0,0,1,0,0,0,16,112,114,111,106,101,99,116,105,111,110,77,97,116,114,105,120,0,0,0,0,0,0,0,7,0,0,0,10,118,105,101,119,101,114,68,97,116,97,0,0,0,1,0,0,0,10,118,105,101,119,77,97,116,114,105,120,0,0,0,0,0,0,0,7,0,0,0,12,105,110,115,116,97,110,99,101,68,97,116,97,0,0,0,1,0,0,0,11,119,111,114,108,100,77,97,116,114,105,120,0,0,0,4,7,0,0,0,4,0,0,0,1,0,0,0,0,0,0,0,7,0,0,0,5,105,110,112,117,116,0,0,0,1,0,0,0,5,105,110,80,111,115,0,0,0,6,0,0,0,1,63,128,0,0,255,255,255,255,255,255,255,255,0,0,0,24,0,0,0,7,0,0,0,6,111,117,116,112,117,116,
\ No newline at end of file
diff --git a/src/Nazara/Shader/Ast/AstCloner.cpp b/src/Nazara/Shader/Ast/AstCloner.cpp
index 496b9d14e..999d445e0 100644
--- a/src/Nazara/Shader/Ast/AstCloner.cpp
+++ b/src/Nazara/Shader/Ast/AstCloner.cpp
@@ -301,6 +301,17 @@ namespace Nz::ShaderAst
 		return clone;
 	}
 
+	ExpressionPtr AstCloner::Clone(UnaryExpression& node)
+	{
+		auto clone = std::make_unique<UnaryExpression>();
+		clone->expression = CloneExpression(node.expression);
+		clone->op = node.op;
+
+		clone->cachedExpressionType = node.cachedExpressionType;
+
+		return clone;
+	}
+
 #define NAZARA_SHADERAST_EXPRESSION(NodeType) void AstCloner::Visit(NodeType& node) \
 	{ \
 		PushExpression(Clone(node)); \
diff --git a/src/Nazara/Shader/Ast/AstOptimizer.cpp b/src/Nazara/Shader/Ast/AstOptimizer.cpp
index 8ec3fe3ab..e5d869a21 100644
--- a/src/Nazara/Shader/Ast/AstOptimizer.cpp
+++ b/src/Nazara/Shader/Ast/AstOptimizer.cpp
@@ -33,13 +33,14 @@ namespace Nz::ShaderAst
 		template<typename T>
 		inline constexpr bool is_complete_v = is_complete<T>::value;
 
+		/*************************************************************************************************/
 
 		template<BinaryType Type, typename T1, typename T2>
-		struct PropagateConstantType;
+		struct BinaryConstantPropagation;
 
 		// CompEq
 		template<typename T1, typename T2>
-		struct CompEqBase
+		struct BinaryCompEqBase
 		{
 			std::unique_ptr<ConstantExpression> operator()(const T1& lhs, const T2& rhs)
 			{
@@ -48,17 +49,17 @@ namespace Nz::ShaderAst
 		};
 
 		template<typename T1, typename T2>
-		struct CompEq;
+		struct BinaryCompEq;
 
 		template<typename T1, typename T2>
-		struct PropagateConstantType<BinaryType::CompEq, T1, T2>
+		struct BinaryConstantPropagation<BinaryType::CompEq, T1, T2>
 		{
-			using Op = CompEq<T1, T2>;
+			using Op = BinaryCompEq<T1, T2>;
 		};
 
 		// CompGe
 		template<typename T1, typename T2>
-		struct CompGeBase
+		struct BinaryCompGeBase
 		{
 			std::unique_ptr<ConstantExpression> operator()(const T1& lhs, const T2& rhs)
 			{
@@ -67,17 +68,17 @@ namespace Nz::ShaderAst
 		};
 
 		template<typename T1, typename T2>
-		struct CompGe;
+		struct BinaryCompGe;
 
 		template<typename T1, typename T2>
-		struct PropagateConstantType<BinaryType::CompGe, T1, T2>
+		struct BinaryConstantPropagation<BinaryType::CompGe, T1, T2>
 		{
-			using Op = CompGe<T1, T2>;
+			using Op = BinaryCompGe<T1, T2>;
 		};
 
 		// CompGt
 		template<typename T1, typename T2>
-		struct CompGtBase
+		struct BinaryCompGtBase
 		{
 			std::unique_ptr<ConstantExpression> operator()(const T1& lhs, const T2& rhs)
 			{
@@ -86,17 +87,17 @@ namespace Nz::ShaderAst
 		};
 
 		template<typename T1, typename T2>
-		struct CompGt;
+		struct BinaryCompGt;
 
 		template<typename T1, typename T2>
-		struct PropagateConstantType<BinaryType::CompGt, T1, T2>
+		struct BinaryConstantPropagation<BinaryType::CompGt, T1, T2>
 		{
-			using Op = CompGt<T1, T2>;
+			using Op = BinaryCompGt<T1, T2>;
 		};
 
 		// CompLe
 		template<typename T1, typename T2>
-		struct CompLeBase
+		struct BinaryCompLeBase
 		{
 			std::unique_ptr<ConstantExpression> operator()(const T1& lhs, const T2& rhs)
 			{
@@ -105,17 +106,17 @@ namespace Nz::ShaderAst
 		};
 
 		template<typename T1, typename T2>
-		struct CompLe;
+		struct BinaryCompLe;
 
 		template<typename T1, typename T2>
-		struct PropagateConstantType<BinaryType::CompLe, T1, T2>
+		struct BinaryConstantPropagation<BinaryType::CompLe, T1, T2>
 		{
-			using Op = CompLe<T1, T2>;
+			using Op = BinaryCompLe<T1, T2>;
 		};
 
 		// CompLt
 		template<typename T1, typename T2>
-		struct CompLtBase
+		struct BinaryCompLtBase
 		{
 			std::unique_ptr<ConstantExpression> operator()(const T1& lhs, const T2& rhs)
 			{
@@ -124,17 +125,17 @@ namespace Nz::ShaderAst
 		};
 
 		template<typename T1, typename T2>
-		struct CompLt;
+		struct BinaryCompLt;
 
 		template<typename T1, typename T2>
-		struct PropagateConstantType<BinaryType::CompLt, T1, T2>
+		struct BinaryConstantPropagation<BinaryType::CompLt, T1, T2>
 		{
-			using Op = CompLe<T1, T2>;
+			using Op = BinaryCompLe<T1, T2>;
 		};
 
 		// CompNe
 		template<typename T1, typename T2>
-		struct CompNeBase
+		struct BinaryCompNeBase
 		{
 			std::unique_ptr<ConstantExpression> operator()(const T1& lhs, const T2& rhs)
 			{
@@ -143,17 +144,17 @@ namespace Nz::ShaderAst
 		};
 
 		template<typename T1, typename T2>
-		struct CompNe;
+		struct BinaryCompNe;
 
 		template<typename T1, typename T2>
-		struct PropagateConstantType<BinaryType::CompNe, T1, T2>
+		struct BinaryConstantPropagation<BinaryType::CompNe, T1, T2>
 		{
-			using Op = CompNe<T1, T2>;
+			using Op = BinaryCompNe<T1, T2>;
 		};
 
 		// Addition
 		template<typename T1, typename T2>
-		struct AdditionBase
+		struct BinaryAdditionBase
 		{
 			std::unique_ptr<ConstantExpression> operator()(const T1& lhs, const T2& rhs)
 			{
@@ -162,17 +163,17 @@ namespace Nz::ShaderAst
 		};
 
 		template<typename T1, typename T2>
-		struct Addition;
+		struct BinaryAddition;
 
 		template<typename T1, typename T2>
-		struct PropagateConstantType<BinaryType::Add, T1, T2>
+		struct BinaryConstantPropagation<BinaryType::Add, T1, T2>
 		{
-			using Op = Addition<T1, T2>;
+			using Op = BinaryAddition<T1, T2>;
 		};
 
 		// Division
 		template<typename T1, typename T2>
-		struct DivisionBase
+		struct BinaryDivisionBase
 		{
 			std::unique_ptr<ConstantExpression> operator()(const T1& lhs, const T2& rhs)
 			{
@@ -181,17 +182,17 @@ namespace Nz::ShaderAst
 		};
 
 		template<typename T1, typename T2>
-		struct Division;
+		struct BinaryDivision;
 
 		template<typename T1, typename T2>
-		struct PropagateConstantType<BinaryType::Divide, T1, T2>
+		struct BinaryConstantPropagation<BinaryType::Divide, T1, T2>
 		{
-			using Op = Division<T1, T2>;
+			using Op = BinaryDivision<T1, T2>;
 		};
 
 		// Multiplication
 		template<typename T1, typename T2>
-		struct MultiplicationBase
+		struct BinaryMultiplicationBase
 		{
 			std::unique_ptr<ConstantExpression> operator()(const T1& lhs, const T2& rhs)
 			{
@@ -200,17 +201,17 @@ namespace Nz::ShaderAst
 		};
 
 		template<typename T1, typename T2>
-		struct Multiplication;
+		struct BinaryMultiplication;
 
 		template<typename T1, typename T2>
-		struct PropagateConstantType<BinaryType::Multiply, T1, T2>
+		struct BinaryConstantPropagation<BinaryType::Multiply, T1, T2>
 		{
-			using Op = Multiplication<T1, T2>;
+			using Op = BinaryMultiplication<T1, T2>;
 		};
 
 		// Subtraction
 		template<typename T1, typename T2>
-		struct SubtractionBase
+		struct BinarySubtractionBase
 		{
 			std::unique_ptr<ConstantExpression> operator()(const T1& lhs, const T2& rhs)
 			{
@@ -219,163 +220,251 @@ namespace Nz::ShaderAst
 		};
 
 		template<typename T1, typename T2>
-		struct Subtraction;
+		struct BinarySubtraction;
 
 		template<typename T1, typename T2>
-		struct PropagateConstantType<BinaryType::Subtract, T1, T2>
+		struct BinaryConstantPropagation<BinaryType::Subtract, T1, T2>
 		{
-			using Op = Subtraction<T1, T2>;
+			using Op = BinarySubtraction<T1, T2>;
+		};
+		
+		/*************************************************************************************************/
+
+		template<UnaryType Type, typename T>
+		struct UnaryConstantPropagation;
+
+		// LogicalNot
+		template<typename T>
+		struct UnaryLogicalNotBase
+		{
+			std::unique_ptr<ConstantExpression> operator()(const T& arg)
+			{
+				return ShaderBuilder::Constant(!arg);
+			}
 		};
 
-#define EnableOptimisation(Op, T1, T2) template<> struct Op<T1, T2> : Op##Base<T1, T2> {}
+		template<typename T>
+		struct UnaryLogicalNot;
 
-		EnableOptimisation(CompEq, bool, bool);
-		EnableOptimisation(CompEq, double, double);
-		EnableOptimisation(CompEq, float, float);
-		EnableOptimisation(CompEq, Nz::Int32, Nz::Int32);
-		EnableOptimisation(CompEq, Nz::Vector2f, Nz::Vector2f);
-		EnableOptimisation(CompEq, Nz::Vector3f, Nz::Vector3f);
-		EnableOptimisation(CompEq, Nz::Vector4f, Nz::Vector4f);
-		EnableOptimisation(CompEq, Nz::Vector2i32, Nz::Vector2i32);
-		EnableOptimisation(CompEq, Nz::Vector3i32, Nz::Vector3i32);
-		EnableOptimisation(CompEq, Nz::Vector4i32, Nz::Vector4i32);
+		template<typename T>
+		struct UnaryConstantPropagation<UnaryType::LogicalNot, T>
+		{
+			using Op = UnaryLogicalNot<T>;
+		};
 
-		EnableOptimisation(CompGe, bool, bool);
-		EnableOptimisation(CompGe, double, double);
-		EnableOptimisation(CompGe, float, float);
-		EnableOptimisation(CompGe, Nz::Int32, Nz::Int32);
-		EnableOptimisation(CompGe, Nz::Vector2f, Nz::Vector2f);
-		EnableOptimisation(CompGe, Nz::Vector3f, Nz::Vector3f);
-		EnableOptimisation(CompGe, Nz::Vector4f, Nz::Vector4f);
-		EnableOptimisation(CompGe, Nz::Vector2i32, Nz::Vector2i32);
-		EnableOptimisation(CompGe, Nz::Vector3i32, Nz::Vector3i32);
-		EnableOptimisation(CompGe, Nz::Vector4i32, Nz::Vector4i32);
+		// Minus
+		template<typename T>
+		struct UnaryMinusBase
+		{
+			std::unique_ptr<ConstantExpression> operator()(const T& arg)
+			{
+				return ShaderBuilder::Constant(-arg);
+			}
+		};
 
-		EnableOptimisation(CompGt, bool, bool);
-		EnableOptimisation(CompGt, double, double);
-		EnableOptimisation(CompGt, float, float);
-		EnableOptimisation(CompGt, Nz::Int32, Nz::Int32);
-		EnableOptimisation(CompGt, Nz::Vector2f, Nz::Vector2f);
-		EnableOptimisation(CompGt, Nz::Vector3f, Nz::Vector3f);
-		EnableOptimisation(CompGt, Nz::Vector4f, Nz::Vector4f);
-		EnableOptimisation(CompGt, Nz::Vector2i32, Nz::Vector2i32);
-		EnableOptimisation(CompGt, Nz::Vector3i32, Nz::Vector3i32);
-		EnableOptimisation(CompGt, Nz::Vector4i32, Nz::Vector4i32);
+		template<typename T>
+		struct UnaryMinus;
 
-		EnableOptimisation(CompLe, bool, bool);
-		EnableOptimisation(CompLe, double, double);
-		EnableOptimisation(CompLe, float, float);
-		EnableOptimisation(CompLe, Nz::Int32, Nz::Int32);
-		EnableOptimisation(CompLe, Nz::Vector2f, Nz::Vector2f);
-		EnableOptimisation(CompLe, Nz::Vector3f, Nz::Vector3f);
-		EnableOptimisation(CompLe, Nz::Vector4f, Nz::Vector4f);
-		EnableOptimisation(CompLe, Nz::Vector2i32, Nz::Vector2i32);
-		EnableOptimisation(CompLe, Nz::Vector3i32, Nz::Vector3i32);
-		EnableOptimisation(CompLe, Nz::Vector4i32, Nz::Vector4i32);
+		template<typename T>
+		struct UnaryConstantPropagation<UnaryType::Minus, T>
+		{
+			using Op = UnaryMinus<T>;
+		};
 
-		EnableOptimisation(CompLt, bool, bool);
-		EnableOptimisation(CompLt, double, double);
-		EnableOptimisation(CompLt, float, float);
-		EnableOptimisation(CompLt, Nz::Int32, Nz::Int32);
-		EnableOptimisation(CompLt, Nz::Vector2f, Nz::Vector2f);
-		EnableOptimisation(CompLt, Nz::Vector3f, Nz::Vector3f);
-		EnableOptimisation(CompLt, Nz::Vector4f, Nz::Vector4f);
-		EnableOptimisation(CompLt, Nz::Vector2i32, Nz::Vector2i32);
-		EnableOptimisation(CompLt, Nz::Vector3i32, Nz::Vector3i32);
-		EnableOptimisation(CompLt, Nz::Vector4i32, Nz::Vector4i32);
+		// Plus
+		template<typename T>
+		struct UnaryPlusBase
+		{
+			std::unique_ptr<ConstantExpression> operator()(const T& arg)
+			{
+				return ShaderBuilder::Constant(arg);
+			}
+		};
 
-		EnableOptimisation(CompNe, bool, bool);
-		EnableOptimisation(CompNe, double, double);
-		EnableOptimisation(CompNe, float, float);
-		EnableOptimisation(CompNe, Nz::Int32, Nz::Int32);
-		EnableOptimisation(CompNe, Nz::Vector2f, Nz::Vector2f);
-		EnableOptimisation(CompNe, Nz::Vector3f, Nz::Vector3f);
-		EnableOptimisation(CompNe, Nz::Vector4f, Nz::Vector4f);
-		EnableOptimisation(CompNe, Nz::Vector2i32, Nz::Vector2i32);
-		EnableOptimisation(CompNe, Nz::Vector3i32, Nz::Vector3i32);
-		EnableOptimisation(CompNe, Nz::Vector4i32, Nz::Vector4i32);
+		template<typename T>
+		struct UnaryPlus;
 
-		EnableOptimisation(Addition, double, double);
-		EnableOptimisation(Addition, float, float);
-		EnableOptimisation(Addition, Nz::Int32, Nz::Int32);
-		EnableOptimisation(Addition, Nz::Vector2f, Nz::Vector2f);
-		EnableOptimisation(Addition, Nz::Vector3f, Nz::Vector3f);
-		EnableOptimisation(Addition, Nz::Vector4f, Nz::Vector4f);
-		EnableOptimisation(Addition, Nz::Vector2i32, Nz::Vector2i32);
-		EnableOptimisation(Addition, Nz::Vector3i32, Nz::Vector3i32);
-		EnableOptimisation(Addition, Nz::Vector4i32, Nz::Vector4i32);
+		template<typename T>
+		struct UnaryConstantPropagation<UnaryType::Plus, T>
+		{
+			using Op = UnaryPlus<T>;
+		};
 
-		EnableOptimisation(Division, double, double);
-		EnableOptimisation(Division, double, Nz::Vector2d);
-		EnableOptimisation(Division, double, Nz::Vector3d);
-		EnableOptimisation(Division, double, Nz::Vector4d);
-		EnableOptimisation(Division, float, float);
-		EnableOptimisation(Division, float, Nz::Vector2f);
-		EnableOptimisation(Division, float, Nz::Vector3f);
-		EnableOptimisation(Division, float, Nz::Vector4f);
-		EnableOptimisation(Division, Nz::Int32, Nz::Int32);
-		EnableOptimisation(Division, Nz::Int32, Nz::Vector2i32);
-		EnableOptimisation(Division, Nz::Int32, Nz::Vector3i32);
-		EnableOptimisation(Division, Nz::Int32, Nz::Vector4i32);
-		EnableOptimisation(Division, Nz::Vector2f, float);
-		EnableOptimisation(Division, Nz::Vector2f, Nz::Vector2f);
-		EnableOptimisation(Division, Nz::Vector3f, float);
-		EnableOptimisation(Division, Nz::Vector3f, Nz::Vector3f);
-		EnableOptimisation(Division, Nz::Vector4f, float);
-		EnableOptimisation(Division, Nz::Vector4f, Nz::Vector4f);
-		EnableOptimisation(Division, Nz::Vector2d, double);
-		EnableOptimisation(Division, Nz::Vector2d, Nz::Vector2d);
-		EnableOptimisation(Division, Nz::Vector3d, double);
-		EnableOptimisation(Division, Nz::Vector3d, Nz::Vector3d);
-		EnableOptimisation(Division, Nz::Vector4d, double);
-		EnableOptimisation(Division, Nz::Vector4d, Nz::Vector4d);
-		EnableOptimisation(Division, Nz::Vector2i32, Nz::Int32);
-		EnableOptimisation(Division, Nz::Vector2i32, Nz::Vector2i32);
-		EnableOptimisation(Division, Nz::Vector3i32, Nz::Int32);
-		EnableOptimisation(Division, Nz::Vector3i32, Nz::Vector3i32);
-		EnableOptimisation(Division, Nz::Vector4i32, Nz::Int32);
-		EnableOptimisation(Division, Nz::Vector4i32, Nz::Vector4i32);
+#define EnableOptimisation(Op, ...) template<> struct Op<__VA_ARGS__> : Op##Base<__VA_ARGS__> {}
 
-		EnableOptimisation(Multiplication, double, double);
-		EnableOptimisation(Multiplication, double, Nz::Vector2d);
-		EnableOptimisation(Multiplication, double, Nz::Vector3d);
-		EnableOptimisation(Multiplication, double, Nz::Vector4d);
-		EnableOptimisation(Multiplication, float, float);
-		EnableOptimisation(Multiplication, float, Nz::Vector2f);
-		EnableOptimisation(Multiplication, float, Nz::Vector3f);
-		EnableOptimisation(Multiplication, float, Nz::Vector4f);
-		EnableOptimisation(Multiplication, Nz::Int32, Nz::Int32);
-		EnableOptimisation(Multiplication, Nz::Int32, Nz::Vector2i32);
-		EnableOptimisation(Multiplication, Nz::Int32, Nz::Vector3i32);
-		EnableOptimisation(Multiplication, Nz::Int32, Nz::Vector4i32);
-		EnableOptimisation(Multiplication, Nz::Vector2f, float);
-		EnableOptimisation(Multiplication, Nz::Vector2f, Nz::Vector2f);
-		EnableOptimisation(Multiplication, Nz::Vector3f, float);
-		EnableOptimisation(Multiplication, Nz::Vector3f, Nz::Vector3f);
-		EnableOptimisation(Multiplication, Nz::Vector4f, float);
-		EnableOptimisation(Multiplication, Nz::Vector4f, Nz::Vector4f);
-		EnableOptimisation(Multiplication, Nz::Vector2d, double);
-		EnableOptimisation(Multiplication, Nz::Vector2d, Nz::Vector2d);
-		EnableOptimisation(Multiplication, Nz::Vector3d, double);
-		EnableOptimisation(Multiplication, Nz::Vector3d, Nz::Vector3d);
-		EnableOptimisation(Multiplication, Nz::Vector4d, double);
-		EnableOptimisation(Multiplication, Nz::Vector4d, Nz::Vector4d);
-		EnableOptimisation(Multiplication, Nz::Vector2i32, Nz::Int32);
-		EnableOptimisation(Multiplication, Nz::Vector2i32, Nz::Vector2i32);
-		EnableOptimisation(Multiplication, Nz::Vector3i32, Nz::Int32);
-		EnableOptimisation(Multiplication, Nz::Vector3i32, Nz::Vector3i32);
-		EnableOptimisation(Multiplication, Nz::Vector4i32, Nz::Int32);
-		EnableOptimisation(Multiplication, Nz::Vector4i32, Nz::Vector4i32);
+		// Binary
 
-		EnableOptimisation(Subtraction, double, double);
-		EnableOptimisation(Subtraction, float, float);
-		EnableOptimisation(Subtraction, Nz::Int32, Nz::Int32);
-		EnableOptimisation(Subtraction, Nz::Vector2f, Nz::Vector2f);
-		EnableOptimisation(Subtraction, Nz::Vector3f, Nz::Vector3f);
-		EnableOptimisation(Subtraction, Nz::Vector4f, Nz::Vector4f);
-		EnableOptimisation(Subtraction, Nz::Vector2i32, Nz::Vector2i32);
-		EnableOptimisation(Subtraction, Nz::Vector3i32, Nz::Vector3i32);
-		EnableOptimisation(Subtraction, Nz::Vector4i32, Nz::Vector4i32);
+		EnableOptimisation(BinaryCompEq, bool, bool);
+		EnableOptimisation(BinaryCompEq, double, double);
+		EnableOptimisation(BinaryCompEq, float, float);
+		EnableOptimisation(BinaryCompEq, Nz::Int32, Nz::Int32);
+		EnableOptimisation(BinaryCompEq, Nz::Vector2f, Nz::Vector2f);
+		EnableOptimisation(BinaryCompEq, Nz::Vector3f, Nz::Vector3f);
+		EnableOptimisation(BinaryCompEq, Nz::Vector4f, Nz::Vector4f);
+		EnableOptimisation(BinaryCompEq, Nz::Vector2i32, Nz::Vector2i32);
+		EnableOptimisation(BinaryCompEq, Nz::Vector3i32, Nz::Vector3i32);
+		EnableOptimisation(BinaryCompEq, Nz::Vector4i32, Nz::Vector4i32);
+
+		EnableOptimisation(BinaryCompGe, bool, bool);
+		EnableOptimisation(BinaryCompGe, double, double);
+		EnableOptimisation(BinaryCompGe, float, float);
+		EnableOptimisation(BinaryCompGe, Nz::Int32, Nz::Int32);
+		EnableOptimisation(BinaryCompGe, Nz::Vector2f, Nz::Vector2f);
+		EnableOptimisation(BinaryCompGe, Nz::Vector3f, Nz::Vector3f);
+		EnableOptimisation(BinaryCompGe, Nz::Vector4f, Nz::Vector4f);
+		EnableOptimisation(BinaryCompGe, Nz::Vector2i32, Nz::Vector2i32);
+		EnableOptimisation(BinaryCompGe, Nz::Vector3i32, Nz::Vector3i32);
+		EnableOptimisation(BinaryCompGe, Nz::Vector4i32, Nz::Vector4i32);
+
+		EnableOptimisation(BinaryCompGt, bool, bool);
+		EnableOptimisation(BinaryCompGt, double, double);
+		EnableOptimisation(BinaryCompGt, float, float);
+		EnableOptimisation(BinaryCompGt, Nz::Int32, Nz::Int32);
+		EnableOptimisation(BinaryCompGt, Nz::Vector2f, Nz::Vector2f);
+		EnableOptimisation(BinaryCompGt, Nz::Vector3f, Nz::Vector3f);
+		EnableOptimisation(BinaryCompGt, Nz::Vector4f, Nz::Vector4f);
+		EnableOptimisation(BinaryCompGt, Nz::Vector2i32, Nz::Vector2i32);
+		EnableOptimisation(BinaryCompGt, Nz::Vector3i32, Nz::Vector3i32);
+		EnableOptimisation(BinaryCompGt, Nz::Vector4i32, Nz::Vector4i32);
+
+		EnableOptimisation(BinaryCompLe, bool, bool);
+		EnableOptimisation(BinaryCompLe, double, double);
+		EnableOptimisation(BinaryCompLe, float, float);
+		EnableOptimisation(BinaryCompLe, Nz::Int32, Nz::Int32);
+		EnableOptimisation(BinaryCompLe, Nz::Vector2f, Nz::Vector2f);
+		EnableOptimisation(BinaryCompLe, Nz::Vector3f, Nz::Vector3f);
+		EnableOptimisation(BinaryCompLe, Nz::Vector4f, Nz::Vector4f);
+		EnableOptimisation(BinaryCompLe, Nz::Vector2i32, Nz::Vector2i32);
+		EnableOptimisation(BinaryCompLe, Nz::Vector3i32, Nz::Vector3i32);
+		EnableOptimisation(BinaryCompLe, Nz::Vector4i32, Nz::Vector4i32);
+
+		EnableOptimisation(BinaryCompLt, bool, bool);
+		EnableOptimisation(BinaryCompLt, double, double);
+		EnableOptimisation(BinaryCompLt, float, float);
+		EnableOptimisation(BinaryCompLt, Nz::Int32, Nz::Int32);
+		EnableOptimisation(BinaryCompLt, Nz::Vector2f, Nz::Vector2f);
+		EnableOptimisation(BinaryCompLt, Nz::Vector3f, Nz::Vector3f);
+		EnableOptimisation(BinaryCompLt, Nz::Vector4f, Nz::Vector4f);
+		EnableOptimisation(BinaryCompLt, Nz::Vector2i32, Nz::Vector2i32);
+		EnableOptimisation(BinaryCompLt, Nz::Vector3i32, Nz::Vector3i32);
+		EnableOptimisation(BinaryCompLt, Nz::Vector4i32, Nz::Vector4i32);
+
+		EnableOptimisation(BinaryCompNe, bool, bool);
+		EnableOptimisation(BinaryCompNe, double, double);
+		EnableOptimisation(BinaryCompNe, float, float);
+		EnableOptimisation(BinaryCompNe, Nz::Int32, Nz::Int32);
+		EnableOptimisation(BinaryCompNe, Nz::Vector2f, Nz::Vector2f);
+		EnableOptimisation(BinaryCompNe, Nz::Vector3f, Nz::Vector3f);
+		EnableOptimisation(BinaryCompNe, Nz::Vector4f, Nz::Vector4f);
+		EnableOptimisation(BinaryCompNe, Nz::Vector2i32, Nz::Vector2i32);
+		EnableOptimisation(BinaryCompNe, Nz::Vector3i32, Nz::Vector3i32);
+		EnableOptimisation(BinaryCompNe, Nz::Vector4i32, Nz::Vector4i32);
+
+		EnableOptimisation(BinaryAddition, double, double);
+		EnableOptimisation(BinaryAddition, float, float);
+		EnableOptimisation(BinaryAddition, Nz::Int32, Nz::Int32);
+		EnableOptimisation(BinaryAddition, Nz::Vector2f, Nz::Vector2f);
+		EnableOptimisation(BinaryAddition, Nz::Vector3f, Nz::Vector3f);
+		EnableOptimisation(BinaryAddition, Nz::Vector4f, Nz::Vector4f);
+		EnableOptimisation(BinaryAddition, Nz::Vector2i32, Nz::Vector2i32);
+		EnableOptimisation(BinaryAddition, Nz::Vector3i32, Nz::Vector3i32);
+		EnableOptimisation(BinaryAddition, Nz::Vector4i32, Nz::Vector4i32);
+
+		EnableOptimisation(BinaryDivision, double, double);
+		EnableOptimisation(BinaryDivision, double, Nz::Vector2d);
+		EnableOptimisation(BinaryDivision, double, Nz::Vector3d);
+		EnableOptimisation(BinaryDivision, double, Nz::Vector4d);
+		EnableOptimisation(BinaryDivision, float, float);
+		EnableOptimisation(BinaryDivision, float, Nz::Vector2f);
+		EnableOptimisation(BinaryDivision, float, Nz::Vector3f);
+		EnableOptimisation(BinaryDivision, float, Nz::Vector4f);
+		EnableOptimisation(BinaryDivision, Nz::Int32, Nz::Int32);
+		EnableOptimisation(BinaryDivision, Nz::Int32, Nz::Vector2i32);
+		EnableOptimisation(BinaryDivision, Nz::Int32, Nz::Vector3i32);
+		EnableOptimisation(BinaryDivision, Nz::Int32, Nz::Vector4i32);
+		EnableOptimisation(BinaryDivision, Nz::Vector2f, float);
+		EnableOptimisation(BinaryDivision, Nz::Vector2f, Nz::Vector2f);
+		EnableOptimisation(BinaryDivision, Nz::Vector3f, float);
+		EnableOptimisation(BinaryDivision, Nz::Vector3f, Nz::Vector3f);
+		EnableOptimisation(BinaryDivision, Nz::Vector4f, float);
+		EnableOptimisation(BinaryDivision, Nz::Vector4f, Nz::Vector4f);
+		EnableOptimisation(BinaryDivision, Nz::Vector2d, double);
+		EnableOptimisation(BinaryDivision, Nz::Vector2d, Nz::Vector2d);
+		EnableOptimisation(BinaryDivision, Nz::Vector3d, double);
+		EnableOptimisation(BinaryDivision, Nz::Vector3d, Nz::Vector3d);
+		EnableOptimisation(BinaryDivision, Nz::Vector4d, double);
+		EnableOptimisation(BinaryDivision, Nz::Vector4d, Nz::Vector4d);
+		EnableOptimisation(BinaryDivision, Nz::Vector2i32, Nz::Int32);
+		EnableOptimisation(BinaryDivision, Nz::Vector2i32, Nz::Vector2i32);
+		EnableOptimisation(BinaryDivision, Nz::Vector3i32, Nz::Int32);
+		EnableOptimisation(BinaryDivision, Nz::Vector3i32, Nz::Vector3i32);
+		EnableOptimisation(BinaryDivision, Nz::Vector4i32, Nz::Int32);
+		EnableOptimisation(BinaryDivision, Nz::Vector4i32, Nz::Vector4i32);
+
+		EnableOptimisation(BinaryMultiplication, double, double);
+		EnableOptimisation(BinaryMultiplication, double, Nz::Vector2d);
+		EnableOptimisation(BinaryMultiplication, double, Nz::Vector3d);
+		EnableOptimisation(BinaryMultiplication, double, Nz::Vector4d);
+		EnableOptimisation(BinaryMultiplication, float, float);
+		EnableOptimisation(BinaryMultiplication, float, Nz::Vector2f);
+		EnableOptimisation(BinaryMultiplication, float, Nz::Vector3f);
+		EnableOptimisation(BinaryMultiplication, float, Nz::Vector4f);
+		EnableOptimisation(BinaryMultiplication, Nz::Int32, Nz::Int32);
+		EnableOptimisation(BinaryMultiplication, Nz::Int32, Nz::Vector2i32);
+		EnableOptimisation(BinaryMultiplication, Nz::Int32, Nz::Vector3i32);
+		EnableOptimisation(BinaryMultiplication, Nz::Int32, Nz::Vector4i32);
+		EnableOptimisation(BinaryMultiplication, Nz::Vector2f, float);
+		EnableOptimisation(BinaryMultiplication, Nz::Vector2f, Nz::Vector2f);
+		EnableOptimisation(BinaryMultiplication, Nz::Vector3f, float);
+		EnableOptimisation(BinaryMultiplication, Nz::Vector3f, Nz::Vector3f);
+		EnableOptimisation(BinaryMultiplication, Nz::Vector4f, float);
+		EnableOptimisation(BinaryMultiplication, Nz::Vector4f, Nz::Vector4f);
+		EnableOptimisation(BinaryMultiplication, Nz::Vector2d, double);
+		EnableOptimisation(BinaryMultiplication, Nz::Vector2d, Nz::Vector2d);
+		EnableOptimisation(BinaryMultiplication, Nz::Vector3d, double);
+		EnableOptimisation(BinaryMultiplication, Nz::Vector3d, Nz::Vector3d);
+		EnableOptimisation(BinaryMultiplication, Nz::Vector4d, double);
+		EnableOptimisation(BinaryMultiplication, Nz::Vector4d, Nz::Vector4d);
+		EnableOptimisation(BinaryMultiplication, Nz::Vector2i32, Nz::Int32);
+		EnableOptimisation(BinaryMultiplication, Nz::Vector2i32, Nz::Vector2i32);
+		EnableOptimisation(BinaryMultiplication, Nz::Vector3i32, Nz::Int32);
+		EnableOptimisation(BinaryMultiplication, Nz::Vector3i32, Nz::Vector3i32);
+		EnableOptimisation(BinaryMultiplication, Nz::Vector4i32, Nz::Int32);
+		EnableOptimisation(BinaryMultiplication, Nz::Vector4i32, Nz::Vector4i32);
+
+		EnableOptimisation(BinarySubtraction, double, double);
+		EnableOptimisation(BinarySubtraction, float, float);
+		EnableOptimisation(BinarySubtraction, Nz::Int32, Nz::Int32);
+		EnableOptimisation(BinarySubtraction, Nz::Vector2f, Nz::Vector2f);
+		EnableOptimisation(BinarySubtraction, Nz::Vector3f, Nz::Vector3f);
+		EnableOptimisation(BinarySubtraction, Nz::Vector4f, Nz::Vector4f);
+		EnableOptimisation(BinarySubtraction, Nz::Vector2i32, Nz::Vector2i32);
+		EnableOptimisation(BinarySubtraction, Nz::Vector3i32, Nz::Vector3i32);
+		EnableOptimisation(BinarySubtraction, Nz::Vector4i32, Nz::Vector4i32);
+
+		// Unary
+
+		EnableOptimisation(UnaryLogicalNot, bool);
+
+		EnableOptimisation(UnaryMinus, double);
+		EnableOptimisation(UnaryMinus, float);
+		EnableOptimisation(UnaryMinus, Nz::Int32);
+		EnableOptimisation(UnaryMinus, Nz::Vector2f);
+		EnableOptimisation(UnaryMinus, Nz::Vector3f);
+		EnableOptimisation(UnaryMinus, Nz::Vector4f);
+		EnableOptimisation(UnaryMinus, Nz::Vector2i32);
+		EnableOptimisation(UnaryMinus, Nz::Vector3i32);
+		EnableOptimisation(UnaryMinus, Nz::Vector4i32);
+
+		EnableOptimisation(UnaryPlus, double);
+		EnableOptimisation(UnaryPlus, float);
+		EnableOptimisation(UnaryPlus, Nz::Int32);
+		EnableOptimisation(UnaryPlus, Nz::Vector2f);
+		EnableOptimisation(UnaryPlus, Nz::Vector3f);
+		EnableOptimisation(UnaryPlus, Nz::Vector4f);
+		EnableOptimisation(UnaryPlus, Nz::Vector2i32);
+		EnableOptimisation(UnaryPlus, Nz::Vector3i32);
+		EnableOptimisation(UnaryPlus, Nz::Vector4i32);
 
 #undef EnableOptimisation
 	}
@@ -525,6 +614,40 @@ namespace Nz::ShaderAst
 			return AstCloner::Clone(node.falsePath);
 	}
 
+	ExpressionPtr AstOptimizer::Clone(UnaryExpression& node)
+	{
+		auto expr = CloneExpression(node.expression);
+
+		if (expr->GetType() == NodeType::ConstantExpression)
+		{
+			auto constantExpr = static_unique_pointer_cast<ConstantExpression>(std::move(expr));
+
+			ExpressionPtr optimized;
+			switch (node.op)
+			{
+				case UnaryType::LogicalNot:
+					optimized = PropagateConstant<UnaryType::LogicalNot>(std::move(constantExpr));
+					break;
+
+				case UnaryType::Minus:
+					optimized = PropagateConstant<UnaryType::Minus>(std::move(constantExpr));
+					break;
+
+				case UnaryType::Plus:
+					optimized = PropagateConstant<UnaryType::Plus>(std::move(constantExpr));
+					break;
+			}
+
+			if (optimized)
+				return optimized;
+		}
+
+		auto unary = ShaderBuilder::Unary(node.op, std::move(expr));
+		unary->cachedExpressionType = node.cachedExpressionType;
+
+		return unary;
+	}
+
 	StatementPtr AstOptimizer::Clone(ConditionalStatement& node)
 	{
 		if (!m_enabledOptions)
@@ -547,7 +670,7 @@ namespace Nz::ShaderAst
 			std::visit([&](auto&& arg2)
 			{
 				using T2 = std::decay_t<decltype(arg2)>;
-				using PCType = PropagateConstantType<Type, T1, T2>;
+				using PCType = BinaryConstantPropagation<Type, T1, T2>;
 
 				if constexpr (is_complete_v<PCType>)
 				{
@@ -564,4 +687,27 @@ namespace Nz::ShaderAst
 
 		return optimized;
 	}
+
+	template<UnaryType Type>
+	ExpressionPtr AstOptimizer::PropagateConstant(std::unique_ptr<ConstantExpression>&& operand)
+	{
+		std::unique_ptr<ConstantExpression> optimized;
+		std::visit([&](auto&& arg)
+		{
+			using T = std::decay_t<decltype(arg)>;
+			using PCType = UnaryConstantPropagation<Type, T>;
+
+			if constexpr (is_complete_v<PCType>)
+			{
+				using Op = typename PCType::Op;
+				if constexpr (is_complete_v<Op>)
+					optimized = Op{}(arg);
+			}
+		}, operand->value);
+
+		if (optimized)
+			optimized->cachedExpressionType = optimized->GetExpressionType();
+
+		return optimized;
+	}
 }
diff --git a/src/Nazara/Shader/Ast/AstRecursiveVisitor.cpp b/src/Nazara/Shader/Ast/AstRecursiveVisitor.cpp
index 85e8b2507..0e646be65 100644
--- a/src/Nazara/Shader/Ast/AstRecursiveVisitor.cpp
+++ b/src/Nazara/Shader/Ast/AstRecursiveVisitor.cpp
@@ -73,11 +73,16 @@ namespace Nz::ShaderAst
 		node.expression->Visit(*this);
 	}
 
-	void AstRecursiveVisitor::Visit(VariableExpression& node)
+	void AstRecursiveVisitor::Visit(VariableExpression& /*node*/)
 	{
 		/* Nothing to do */
 	}
 
+	void AstRecursiveVisitor::Visit(UnaryExpression& node)
+	{
+		node.expression->Visit(*this);
+	}
+
 	void AstRecursiveVisitor::Visit(BranchStatement& node)
 	{
 		for (auto& cond : node.condStatements)
@@ -95,7 +100,7 @@ namespace Nz::ShaderAst
 		node.statement->Visit(*this);
 	}
 
-	void AstRecursiveVisitor::Visit(DeclareExternalStatement& node)
+	void AstRecursiveVisitor::Visit(DeclareExternalStatement& /*node*/)
 	{
 		/* Nothing to do */
 	}
diff --git a/src/Nazara/Shader/Ast/AstSerializer.cpp b/src/Nazara/Shader/Ast/AstSerializer.cpp
index fee7d53fd..78b1647ea 100644
--- a/src/Nazara/Shader/Ast/AstSerializer.cpp
+++ b/src/Nazara/Shader/Ast/AstSerializer.cpp
@@ -147,6 +147,12 @@ namespace Nz::ShaderAst
 		SizeT(node.variableId);
 	}
 
+	void AstSerializerBase::Serialize(UnaryExpression& node)
+	{
+		Enum(node.op);
+		Node(node.expression);
+	}
+
 
 	void AstSerializerBase::Serialize(BranchStatement& node)
 	{
diff --git a/src/Nazara/Shader/Ast/AstUtils.cpp b/src/Nazara/Shader/Ast/AstUtils.cpp
index 76496ddf0..ae21847dd 100644
--- a/src/Nazara/Shader/Ast/AstUtils.cpp
+++ b/src/Nazara/Shader/Ast/AstUtils.cpp
@@ -86,8 +86,13 @@ namespace Nz::ShaderAst
 		node.expression->Visit(*this);
 	}
 
-	void ShaderAstValueCategory::Visit(VariableExpression& node)
+	void ShaderAstValueCategory::Visit(VariableExpression& /*node*/)
 	{
 		m_expressionCategory = ExpressionCategory::LValue;
 	}
+
+	void ShaderAstValueCategory::Visit(UnaryExpression& /*node*/)
+	{
+		m_expressionCategory = ExpressionCategory::RValue;
+	}
 }
diff --git a/src/Nazara/Shader/Ast/SanitizeVisitor.cpp b/src/Nazara/Shader/Ast/SanitizeVisitor.cpp
index 50f86f59e..54fb5f8eb 100644
--- a/src/Nazara/Shader/Ast/SanitizeVisitor.cpp
+++ b/src/Nazara/Shader/Ast/SanitizeVisitor.cpp
@@ -592,6 +592,41 @@ namespace Nz::ShaderAst
 		return clone;
 	}
 
+	ExpressionPtr SanitizeVisitor::Clone(UnaryExpression& node)
+	{
+		auto clone = static_unique_pointer_cast<UnaryExpression>(AstCloner::Clone(node));
+
+		const ExpressionType& exprType = GetExpressionType(MandatoryExpr(clone->expression));
+		if (!IsPrimitiveType(exprType))
+			throw AstError{ "unary expression operand type does not support unary operation" };
+
+		PrimitiveType primitiveType = std::get<PrimitiveType>(exprType);
+
+		switch (node.op)
+		{
+			case UnaryType::LogicalNot:
+			{
+				if (primitiveType != PrimitiveType::Boolean)
+					throw AstError{ "logical not is only supported on booleans" };
+
+				break;
+			}
+
+			case UnaryType::Minus:
+			case UnaryType::Plus:
+			{
+				if (primitiveType != PrimitiveType::Float32 && primitiveType != PrimitiveType::Int32 && primitiveType != PrimitiveType::UInt32)
+					throw AstError{ "plus and minus unary expressions are only supported on floating points and integers types" };
+
+				break;
+			}
+		}
+
+		clone->cachedExpressionType = primitiveType;
+
+		return clone;
+	}
+
 	StatementPtr SanitizeVisitor::Clone(BranchStatement& node)
 	{
 		auto clone = std::make_unique<BranchStatement>();
diff --git a/src/Nazara/Shader/GlslWriter.cpp b/src/Nazara/Shader/GlslWriter.cpp
index 3d355f4a6..c3a419fd1 100644
--- a/src/Nazara/Shader/GlslWriter.cpp
+++ b/src/Nazara/Shader/GlslWriter.cpp
@@ -922,6 +922,26 @@ namespace Nz
 		Append(varName);
 	}
 
+	void GlslWriter::Visit(ShaderAst::UnaryExpression& node)
+	{
+		switch (node.op)
+		{
+			case ShaderAst::UnaryType::LogicalNot:
+				Append("!");
+				break;
+
+			case ShaderAst::UnaryType::Minus:
+				Append("-");
+				break;
+
+			case ShaderAst::UnaryType::Plus:
+				Append("+");
+				break;
+		}
+
+		Visit(node.expression);
+	}
+
 	bool GlslWriter::HasExplicitBinding(ShaderAst::StatementPtr& shader)
 	{
 		/*for (const auto& uniform : shader.GetUniforms())
diff --git a/src/Nazara/Shader/LangWriter.cpp b/src/Nazara/Shader/LangWriter.cpp
index d836214de..13031737b 100644
--- a/src/Nazara/Shader/LangWriter.cpp
+++ b/src/Nazara/Shader/LangWriter.cpp
@@ -107,7 +107,7 @@ namespace Nz
 		}, type);
 	}
 
-	void LangWriter::Append(const ShaderAst::IdentifierType& identifierType)
+	void LangWriter::Append(const ShaderAst::IdentifierType& /*identifierType*/)
 	{
 		throw std::runtime_error("unexpected identifier type");
 	}
@@ -730,6 +730,26 @@ namespace Nz
 		Append(varName);
 	}
 
+	void LangWriter::Visit(ShaderAst::UnaryExpression& node)
+	{
+		switch (node.op)
+		{
+			case ShaderAst::UnaryType::LogicalNot:
+				Append("!");
+				break;
+
+			case ShaderAst::UnaryType::Minus:
+				Append("-");
+				break;
+
+			case ShaderAst::UnaryType::Plus:
+				Append("+");
+				break;
+		}
+
+		Append(node.expression);
+	}
+
 	void LangWriter::AppendHeader()
 	{
 		// Nothing yet
diff --git a/src/Nazara/Shader/ShaderLangParser.cpp b/src/Nazara/Shader/ShaderLangParser.cpp
index d3978f8bb..66cf22c3c 100644
--- a/src/Nazara/Shader/ShaderLangParser.cpp
+++ b/src/Nazara/Shader/ShaderLangParser.cpp
@@ -802,10 +802,10 @@ namespace Nz::ShaderLang
 		return ParseBinOpRhs(0, ParsePrimaryExpression());
 	}
 
-	ShaderAst::ExpressionPtr Parser::ParseFloatingPointExpression(bool minus)
+	ShaderAst::ExpressionPtr Parser::ParseFloatingPointExpression()
 	{
 		const Token& floatingPointToken = Expect(Advance(), TokenType::FloatingPointValue);
-		return ShaderBuilder::Constant(((minus) ? -1.f : 1.f) * float(std::get<double>(floatingPointToken.data))); //< FIXME
+		return ShaderBuilder::Constant(float(std::get<double>(floatingPointToken.data))); //< FIXME
 	}
 
 	ShaderAst::ExpressionPtr Parser::ParseIdentifier()
@@ -816,10 +816,10 @@ namespace Nz::ShaderLang
 		return ShaderBuilder::Identifier(identifier);
 	}
 
-	ShaderAst::ExpressionPtr Parser::ParseIntegerExpression(bool minus)
+	ShaderAst::ExpressionPtr Parser::ParseIntegerExpression()
 	{
 		const Token& integerToken = Expect(Advance(), TokenType::IntegerValue);
-		return ShaderBuilder::Constant(((minus) ? -1 : 1) * static_cast<Nz::Int32>(std::get<long long>(integerToken.data)));
+		return ShaderBuilder::Constant(static_cast<Nz::Int32>(std::get<long long>(integerToken.data))); //< FIXME
 	}
 
 	std::vector<ShaderAst::ExpressionPtr> Parser::ParseParameters()
@@ -894,21 +894,20 @@ namespace Nz::ShaderLang
 				return ParseIntegerExpression();
 
 			case TokenType::Minus:
-				//< FIXME: Handle this with an unary node
-				if (Peek(1).type == TokenType::FloatingPointValue)
-				{
-					Consume();
-					return ParseFloatingPointExpression(true);
-				}
-				else if (Peek(1).type == TokenType::IntegerValue)
-				{
-					Consume();
-					return ParseIntegerExpression(true);
-				}
-				else
-					throw UnexpectedToken{};
+			{
+				Consume();
+				ShaderAst::ExpressionPtr expr = ParsePrimaryExpression();
 
-				break;
+				return ShaderBuilder::Unary(ShaderAst::UnaryType::Minus, std::move(expr));
+			}
+
+			case TokenType::Plus:
+			{
+				Consume();
+				ShaderAst::ExpressionPtr expr = ParsePrimaryExpression();
+
+				return ShaderBuilder::Unary(ShaderAst::UnaryType::Plus, std::move(expr));
+			}
 
 			case TokenType::OpenParenthesis:
 				return ParseParenthesisExpression();
diff --git a/src/Nazara/Shader/SpirvAstVisitor.cpp b/src/Nazara/Shader/SpirvAstVisitor.cpp
index 9cab9ced4..f731cb7c2 100644
--- a/src/Nazara/Shader/SpirvAstVisitor.cpp
+++ b/src/Nazara/Shader/SpirvAstVisitor.cpp
@@ -815,6 +815,61 @@ namespace Nz
 		PushResultId(loadVisitor.Evaluate(node));
 	}
 
+	void SpirvAstVisitor::Visit(ShaderAst::UnaryExpression& node)
+	{
+		const ShaderAst::ExpressionType& resultType = GetExpressionType(node);
+		const ShaderAst::ExpressionType& exprType = GetExpressionType(*node.expression);
+
+		UInt32 operand = EvaluateExpression(node.expression);
+
+		UInt32 resultId = [&]
+		{
+			switch (node.op)
+			{
+				case ShaderAst::UnaryType::LogicalNot:
+				{
+					assert(IsPrimitiveType(exprType));
+					assert(std::get<ShaderAst::PrimitiveType>(resultType) == ShaderAst::PrimitiveType::Boolean);
+
+					UInt32 resultId = m_writer.AllocateResultId();
+					m_currentBlock->Append(SpirvOp::OpLogicalNot, m_writer.GetTypeId(resultType), resultId, operand);
+
+					return resultId;
+				}
+
+				case ShaderAst::UnaryType::Minus:
+				{
+					assert(IsPrimitiveType(exprType));
+
+					UInt32 resultId = m_writer.AllocateResultId();
+
+					switch (std::get<ShaderAst::PrimitiveType>(resultType))
+					{
+						case ShaderAst::PrimitiveType::Float32:
+							m_currentBlock->Append(SpirvOp::OpFNegate, m_writer.GetTypeId(resultType), resultId, operand);
+							return resultId;
+
+						case ShaderAst::PrimitiveType::Int32:
+						case ShaderAst::PrimitiveType::UInt32:
+							m_currentBlock->Append(SpirvOp::OpSNegate, m_writer.GetTypeId(resultType), resultId, operand);
+							return resultId;
+
+						default:
+							break;
+					}
+				}
+
+				case ShaderAst::UnaryType::Plus:
+					PushResultId(operand); //< No-op
+					break;
+			}
+
+			throw std::runtime_error("unexpected unary operation");
+		}();
+
+		PushResultId(resultId);
+	}
+
 	void SpirvAstVisitor::PushResultId(UInt32 value)
 	{
 		m_resultIds.push_back(value);
diff --git a/src/Nazara/Shader/SpirvWriter.cpp b/src/Nazara/Shader/SpirvWriter.cpp
index 30e9c9b43..5bed57c67 100644
--- a/src/Nazara/Shader/SpirvWriter.cpp
+++ b/src/Nazara/Shader/SpirvWriter.cpp
@@ -78,6 +78,13 @@ namespace Nz
 					m_constantCache.Register(*m_constantCache.BuildType(node.cachedExpressionType.value()));
 				}
 
+				void Visit(ShaderAst::BinaryExpression& node) override
+				{
+					AstRecursiveVisitor::Visit(node);
+
+					m_constantCache.Register(*m_constantCache.BuildType(node.cachedExpressionType.value()));
+				}
+
 				void Visit(ShaderAst::ConditionalExpression& node) override
 				{
 					if (TestBit<Nz::UInt64>(m_states.enabledOptions, node.optionIndex))
@@ -294,6 +301,13 @@ namespace Nz
 					m_constantCache.Register(*m_constantCache.BuildType(node.cachedExpressionType.value()));
 				}
 
+				void Visit(ShaderAst::UnaryExpression& node) override
+				{
+					AstRecursiveVisitor::Visit(node);
+
+					m_constantCache.Register(*m_constantCache.BuildType(node.cachedExpressionType.value()));
+				}
+
 				UInt32 HandleEntryInOutType(ShaderStageType entryPointType, std::size_t funcIndex, const ShaderAst::StructDescription::StructMember& member, SpirvStorageClass storageClass)
 				{
 					if (member.builtin)