[ZScript] Upper, middle, and lower translation fields for sidedefs

[kevansevans]

I noticed while browsing the wiki that the TEXTURES lump supports defining a color translation. I’m not sure if this is possible, but I’m hoping sprite rendering and texture rendering are cut from the same cloth and allow dynamic palette swapping on textures possible.

[Graf Zahl]

Yes, it should be doable, also for floors and ceilings.