kPrefilterBandCount top-level constant

int const kPrefilterBandCount

Number of roughness bands in a prefiltered-radiance atlas (band 0 = mirror, band kPrefilterBandCount - 1 = fully rough; band i covers perceptual roughness i / (kPrefilterBandCount - 1)).

Must match kPrefilterBands in shaders/texture.glsl.

Implementation

const int kPrefilterBandCount = 8;