also tga has a really old bug where it flips textures which you then have to correct engine side

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jpeg is ok as long as you dont try alpha channel textures (looks really crap) png is quite a load better in that regard but can make load times a bit high if theres a lot of textures (especially if compressed inside a pak).
im toying with jasper support instead of jpeg since most of the ancient jpeg bugs have been fixed and its still developed.