We've all seen it. A map using a new texture set is released, and you run it in either a modified engine or in software Quake, and there are areas of many textures - sometimes quite huge areas - that glow out of the darkness at you. The recently reviewed Temple of Anubis (over on ) has it, Warpspasm had it, and there are many more.
(screenshot taken in original
WinQuake - for crying out loud!)
What's going on? Are mappers not aware that fullbright colours are a feature of the Quake engine (and quite a deliberate, intentional one at that - check out colormap.lmp), or do they not test their maps in software Quake (or an engine that does support fullbrights)?