Hello,
Need help rasterizing quads. Rasterizing triangles isn't an option since looking for quad affine texture warping behaviour which behaves differently to triangle texture warp.
I can find very little information on quad rasterizing on google.

Thanks for the help in advance.

This might give you some clues: https://github.com/leikareipa/retro-ngon

There's a Tomb Raider demo you can try out (using the original assets) and a good description in the readme.

What are you working on? 3DO/Saturn GPU emulator? ;)