hard20 pts · first answer countsrenderingperformancedepth-buffer

Discard makes opaque slower

Adding `discard` to an opaque shader for a cut-out effect made the whole pass slower, even for pixels that are never discarded. Why?

A.Discard forces the shader to run once per vertexB.Discard turns off texture cachingC.Discard makes the GPU sort draws back to frontD.Discard can disable early depth testing for that shader

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Discard makes opaque slower

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