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Henrik RydgårdandClaude Opus 5.5
d0baab5614
The GE's blend terms are floor((2c+1)(2f+1)/1024), which truncates, while the hardware multiplies by f/255 and rounds, so every pass of a fixed color blend chain came out up to a level brighter. God Eater Burst's bloom is many such passes and ended up far too bright. For additive FIXA/FIXB blends that aren't just 0 and 0xFFFFFF, the shader now computes the src term exactly and lowers it by 0.5 - (2B+1)/1024, and the blend constant is the GE's dst factor (2B+1)/512, so the hardware's rounding of the sum lands on the GE's floor (except where the src term would go below zero). Blend constants are passed as floats to make that possible. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>