Its nice work! my only complaint,
is as a Re-painter. I don't like the DXT1 RGB 4 bpp | no alpha Compression. yes it easy but I can't control the brightness of the car in game. I like rather have
DXT5 ARGB 8 bpp | interpolated alpha
DXT3 ARGB 8 bpp | explicit alpha
Maybe in your next project we need a good 50ft tanks car of a good Centerflow Hopper.
