MIPS
Size must be multiples of 16, so 128, 256, 512, 1024 ..etc
Save the .bmp in Gimp and use winmip2 to convert it.
Type 3 mip has no invisible part.
Type 4 mip uses invisible color.
Type 5 similar to 4 but uses a trace map _ti for the invisible parts (Use this to get rid of background more effectively)
Mip mapping.
0 repeat in all directions
1 repeat up/down
2 repeat left/right
3 no repeat