hey,
@soil: ok, you double the texturesize in each dimension, change from 1024x1024 to 2048x2048, whatever. i meant with the size, the dimension in both directions, not the size of the file.
@cdvader: yeah, M&B uses DXTx compressions, so that they don't use to much space on the hard drive. But once uploaded to the graphic card, they get uncompressed, so that the graphic card don't need to uncompress the textures used every frame. So they need more space in the video memory, especially if the texture has mip-maps. If the texture uses 4 Byte (for red, green, blue, alpha) with a dimension of 2048x2048 and without mip-maps, it uses 16Mb (hope that is right).
I know, my card is old, but for an age of 6, it is performing very good on most games (if i can play them).
eierkopf