The
Simple Pixel Shader
override mode replaces every pixel shader with one that writes a constant color to the render target.If the frame rate shows a large increase with this override enabled, this is an indicator that the performance slowdown is due to pixel shader computation and/or texture performance. In this case, you should inspect your scene with the Graphics Frame Analyzer to identify and rework expensive pixel shaders to improve scene rendering performance.
Normal Picture
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Force Simple Pixel Shader
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