MIP MAPS

Aliasing can be a serious problem when the a texture is mapped into a small area.
-- E.g., in a perspective view of a checker board pattern, the pattern in the horizon is subject to severe aliasing.

[Williams'83]

E.g., a 1024x1024 image can be processed using a box filter to produce 10 levels of the same image (levels 0 to 9).
-- To call the MIP, we supply (s,t,d) where d is the level.
-- d need not be integer -- we use linear interpolation.
-- OpenGL supports MIP