diff --git a/include/Nazara/Utility/IndexBuffer.hpp b/include/Nazara/Utility/IndexBuffer.hpp
index 55b637ea5..2756bdd17 100644
--- a/include/Nazara/Utility/IndexBuffer.hpp
+++ b/include/Nazara/Utility/IndexBuffer.hpp
@@ -25,7 +25,7 @@ class NAZARA_API NzIndexBuffer : public NzResource
 		NzIndexBuffer(const NzIndexBuffer& indexBuffer);
 		~NzIndexBuffer();
 
-		bool Fill(const void* data, unsigned int offset, unsigned int length);
+		bool Fill(const void* data, unsigned int offset, unsigned int length, bool forceDiscard = false);
 
 		NzBuffer* GetBuffer() const;
 		unsigned int GetIndexCount() const;
diff --git a/include/Nazara/Utility/VertexBuffer.hpp b/include/Nazara/Utility/VertexBuffer.hpp
index 083ecf7cb..22112c5b9 100644
--- a/include/Nazara/Utility/VertexBuffer.hpp
+++ b/include/Nazara/Utility/VertexBuffer.hpp
@@ -26,7 +26,7 @@ class NAZARA_API NzVertexBuffer : public NzResource
 		NzVertexBuffer(const NzVertexBuffer& vertexBuffer);
 		~NzVertexBuffer();
 
-		bool Fill(const void* data, unsigned int offset, unsigned int length);
+		bool Fill(const void* data, unsigned int offset, unsigned int length, bool forceDiscard = false);
 
 		NzBuffer* GetBuffer() const;
 		void* GetPointer();
diff --git a/src/Nazara/3D/Scene.cpp b/src/Nazara/3D/Scene.cpp
index c31d8e23e..7cf9701d1 100644
--- a/src/Nazara/3D/Scene.cpp
+++ b/src/Nazara/3D/Scene.cpp
@@ -94,6 +94,8 @@ void NzScene::Cull()
 
 void NzScene::Draw()
 {
+	NzRenderer::Clear(nzRendererClear_Depth);
+
 	LightComparator lightComparator;
 
 	// Pour les meshs squelettiques, on utilise un buffer commun
diff --git a/src/Nazara/Utility/IndexBuffer.cpp b/src/Nazara/Utility/IndexBuffer.cpp
index 64ad4ea4c..988ade336 100644
--- a/src/Nazara/Utility/IndexBuffer.cpp
+++ b/src/Nazara/Utility/IndexBuffer.cpp
@@ -64,7 +64,7 @@ m_startIndex(indexBuffer.m_startIndex)
 
 NzIndexBuffer::~NzIndexBuffer() = default;
 
-bool NzIndexBuffer::Fill(const void* data, unsigned int offset, unsigned int length)
+bool NzIndexBuffer::Fill(const void* data, unsigned int offset, unsigned int length, bool forceDiscard)
 {
 	#if NAZARA_UTILITY_SAFE
 	if (!m_buffer)
@@ -80,7 +80,7 @@ bool NzIndexBuffer::Fill(const void* data, unsigned int offset, unsigned int len
 	}
 	#endif
 
-	return m_buffer->Fill(data, m_startIndex+offset, length);
+	return m_buffer->Fill(data, m_startIndex+offset, length, forceDiscard);
 }
 
 NzBuffer* NzIndexBuffer::GetBuffer() const
diff --git a/src/Nazara/Utility/VertexBuffer.cpp b/src/Nazara/Utility/VertexBuffer.cpp
index 2b5e3d68f..ee73b0b5e 100644
--- a/src/Nazara/Utility/VertexBuffer.cpp
+++ b/src/Nazara/Utility/VertexBuffer.cpp
@@ -70,7 +70,7 @@ m_vertexCount(vertexBuffer.m_vertexCount)
 
 NzVertexBuffer::~NzVertexBuffer() = default;
 
-bool NzVertexBuffer::Fill(const void* data, unsigned int offset, unsigned int length)
+bool NzVertexBuffer::Fill(const void* data, unsigned int offset, unsigned int length, bool forceDiscard)
 {
 	#if NAZARA_UTILITY_SAFE
 	if (offset+length > m_vertexCount)
@@ -80,7 +80,7 @@ bool NzVertexBuffer::Fill(const void* data, unsigned int offset, unsigned int le
 	}
 	#endif
 
-	return m_buffer->Fill(data, m_startVertex+offset, length);
+	return m_buffer->Fill(data, m_startVertex+offset, length, forceDiscard);
 }
 
 NzBuffer* NzVertexBuffer::GetBuffer() const