512x512 tiles floor - a bit too clean for Quake, but nevermind. Notice how I tried to incorporate some red and green tones :) Diffuse only, I discourage from using it with a normal map and specular map, since it's pretty low-res and some details that are on the diffuse should actually come into the spec or norm map if used with per-pixel lighting. If you want to avoid ugly looking textures like in Nexuiz, that is.

Little tip: If you think the tiles' fugues are too superficial, you can always increase the opacity of that layer. Enjoy!

EDIT: Now with a drain! :D