I check that asap and i ll tell you if we change the maximum weight up to 2.3 mo.
OK got it. Use DXT1 compression instead of DXT5 and check the rendering.
I am not a specialist of DX compression so if anyone has some infos about the differences, he's welcome.
It sounds the rules are
DXT1: car body DXT3 or DXT5: windows and wheels
So as you just need to paint car body you need only DXT1.