Fix car reflections in Outrun by implementing per-bit color masking #13640
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The reflections appear to be fixed in both OpenGL & Vulkan (unable to test Direct3D stuff anymore since I can't realistically compile Windows builds here without a VM, which I'm not keen on doing :P). At any rate, here are a couple shots from Vulkan: Nice to see another long-standing issue getting some attention :) |
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Followup to #13636 , implementing the fix for the yellow/blue reflection issue that surfaced after merging that. Just like that one, it's only enabled for Outrun for now, but I'll enable it wider once I gain confidence in it.
See #11358 (comment) for technical details - basically, the PSP can't just mask off the R,G,B and A channels when rendering, it can also mask off individual bits, and Outrun uses this to perform an intricate trick.
We do this masking in the shader. Note: This fix only works on Vulkan, GLES 3+ and desktop GL and D3D11. Not D3D9 and GLES 2.
@thedax :)