if ((GetCVar("vid_renderer")) == 0)
Using that won't work. even if you use zdoom, it's zero. This is probably due to the fact that zdoom now does 3D floors.
There may be another CVar that would work. Mapinfo knows to ignore some things because they aren't in zdoom, the CVar for one or more of those may work. *goes to check the wiki*
Or we could make the textures work for both renderers.
Light_Fade(1, 255, 140);
This makes the titlemap start completely black then fade in, regardless of the port.
Don't stalk anyone; follow them with puppy-like affection.