MSDN MSDN Semantics for HLSL Direct3D 9 VPOS and Direct3D 10 SV_Position Vertex Shader Semantics System-Value Semantics this MSDN page semantic MSDN Direct3D 9 VPOS and Direct3D 10 SV_Position semantic Migration from Direct3D 9 to Direct3D 10 and later Pixel Shader Semantics SV_IsFrontFace System-Value Semantics Related topics Pixel Shader Semantics MSDN Vertex Shader Semantics the MSDN article on the semantic updates User clip planes in HLSL Semantics Supported in Direct3D 9 and Direct3D 10 and later MSDN MSDN the SV_IsFrontFace semantic documentation de Microsoft Microsoft Semantics Double Binding Semantics semantic Semantics Supported Only for Direct3D 10 and Newer. Mapping to Direct3D 9 Semantics System-Value Semantics System-Value Semantics