Quake uses 16 bit and 8 bit as their is not much point in the other two as quake does rarely use channel based shader networks only single diffuse (tri channel) or black and white. I did see a few 32 bit tga's with aphla channels but they were only 64pixels in size so its not much to affect gameplay... when i looked briefly alot of the images were jpegs which is a surprise i didn't think quake 3's graphics were "that" out of date... In other more advance engines you use 32 bit as it allows access to alpha channel values which are basically a whole texture in its self either specular, mask or height map, original quake textures don't commonly do this however.

The reason they didn't use any higher color bit depth values was because they wanted lots of textures (to fit it into current vram specs) so they sacrificed quality for quantity (as there is sure alot of textures for an old game like this.)

edit: i keep scrolling through the quake texture folder and laugh at the tiny textures they used. poly counts werent much higher either.

wrote:

I could do something if i find the time
I just found out how to fix gtk on win 7. Yeeey
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epsislow

I have GTKRadiant on Win7 and it works. But I prefer to use Q3Radiant because of its interface and layout of the keys.

Also sometimes it's better to edit *.map files directly - with notepad or wordpad.

Heh i love map from Call of Duty 4 called Winter Crash Really cool xmas atmosphere and this: ho ho hooo, just amazing ;D would be nice too hear something like that on winters edge xd here short vid from this map: