hard20 pts · first answer countsrenderingmobileperformance

Alpha-tested foliage on mobile

On mobile tile-based GPUs, dense foliage using alpha test (discard / clip) is very expensive. Why?

A.Tile-based GPUs cannot sample textures in foliage shadersB.Alpha test forces the CPU to sort every leafC.Alpha test doubles the vertex countD.Shaders that may discard pixels defeat early depth testing and hidden surface removal, so many hidden layers are shaded

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