The first time the game runs, find out
all you can about the 3D cards capabilities.
& store textures in formats the card likes.
card supports compressed textures, compress now and store that way to speed
If space for textures is limited, downsize them or throw out the top
level mips now.
Some 3D cards have penalties or bonuses for using certain
texture formats, look for this in testing and store a list of the important