by Spike » Tue Mar 03, 2009 1:13 am
The idea behind stain maps is to reduce the blue and green lighting in areas, so blood splattering walls makes them go red.
Once applied stain maps do not impact performance.
Although 1000 gibs flying around a room spraying blood all over the place does, however.
They're a lightmap hack, and depend upon the lighting resolution for their precision. Generally that's a consistant 16-texel/quake-unit precision. Which isn't that great.
They're not so great for deathmatch games, as they tend to linger and just make the map dark. Clipped decals rule.
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