Optimize lighting for softgpu a bit #17295
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This is clearer anyway.
Tiny optimization, helps only a little.
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This ends up only improving FPS by maybe 1-2% for games that push more verts, and it can vary. Although it's faster, some of the time is just traded by waiting for the drawing threads to complete their background work.
Still, it's good to reduce this as it's a bottleneck in some scenes. May help the tradeoffs of some vector (4 pixels at a time) stuff I tried a while back.
-[Unknown]