diff --git a/src/Nazara/Graphics/Loaders/OBJ/MTLParser.cpp b/src/Nazara/Graphics/Loaders/OBJ/MTLParser.cpp
index 48ac75767..17a804f13 100644
--- a/src/Nazara/Graphics/Loaders/OBJ/MTLParser.cpp
+++ b/src/Nazara/Graphics/Loaders/OBJ/MTLParser.cpp
@@ -119,7 +119,7 @@ bool NzMTLParser::Parse()
 				UnrecognizedLine();
 			#endif
 		}
-		else if (keyword == 'd' || keyword == "tr")
+		else if (keyword == 'd')
 		{
 			float alpha;
 			if (std::sscanf(&m_currentLine[(keyword[0] == 'd') ? 2 : 3], "%f", &alpha) == 1)
@@ -134,6 +134,21 @@ bool NzMTLParser::Parse()
 				UnrecognizedLine();
 			#endif
 		}
+		else if (keyword == "tr")
+		{
+			float alpha;
+			if (std::sscanf(&m_currentLine[(keyword[0] == 'd') ? 2 : 3], "%f", &alpha) == 1)
+			{
+				if (!currentMaterial)
+					currentMaterial = &m_materials["default"];
+
+				currentMaterial->alpha = 1.f - alpha; // tr vaut pour la "valeur de transparence", 0 = opaque
+			}
+			#if NAZARA_UTILITY_STRICT_RESOURCE_PARSING
+			else
+				UnrecognizedLine();
+			#endif
+		}
 		else if (keyword == "illum")
 		{
 			unsigned int model;