2 quick things that cause 90% of texture issues in-game but not in radiant. 1) sv_pure 0 it up (To force game to use assets NOT in the pk3 files) 2) Make sure the texture resolution is a power of 2. (Radiant will load any size, JKA will not.) Check these first! FYI though, jpg and tga both work fine, but sometimes the compiler just says TGA for weird reasons.