When the texture format is CT16 and TCC = 1, the GS will do a look-up into TEXA to determine the output alpha.
The previous behaviour made it so when A = 0 OR A = 1 in the input texel, the output alpha would be the full 0x80.
This is kind of a footgun (I've only found this behaviour due to a developer running into an issue with alpha blending).
It's assumable that if your alpha is 0, you would want no output, and that's what the PR achieves.
If this PR creates an issue where you get no texture output, you should either fix your input texture alpha, or manually set TEXA to your desired (and probably hacky :^) ) value.
When the texture format is CT16 and
TCC = 1, the GS will do a look-up into TEXA to determine the output alpha. The previous behaviour made it so whenA = 0ORA = 1in the input texel, the output alpha would be the full 0x80. This is kind of a footgun (I've only found this behaviour due to a developer running into an issue with alpha blending). It's assumable that if your alpha is 0, you would want no output, and that's what the PR achieves.If this PR creates an issue where you get no texture output, you should either fix your input texture alpha, or manually set TEXA to your desired (and probably hacky :^) ) value.