I'm also a great beliver in the mutiples of 16, for the size, as Lyrra said. Years and years ago I used to program in C, and I dimly remember that computers count on 16 fingers- 1,2,3,4,5,6,7,8,9,A,B,C,D,E,F,10 my thinking is why not make it easier on the computer, instead of a random size? 3000 is a nice even number, but not in base/16 counting. ;-) I also seldom make textures bigger than 2048 x 1536 or so, too.