Aye but I'm wondering does the game recognise it as the same texture or does it just load the same one twice? Its set up for two textures so it might just treat the two entries as two different files. If theres some conflict there when it goes to render the texture it could cause glitchs in the model, not sure what else would cause it, or if that would for that matter. Could be the game has a problem when its recalculating and applying the uv co-ords, the two textures are treated as one for that purpose in the .mesh, could be having prob's applying both sets to the same texture. Splitting the texture into 2 1024*512 pieces should get around it too, I think all meshs of the same type have to be on the same tex though.