Yep - just tile your graphics from 64 X 64 to 256 X 256 - or write a program to do it for you.
Personally I wouldn't trust the feedback you get from the driver. So I produce tiles manually using Photoshop's snap grid feature at a standard 256 X 256 max.
Personally I wouldn't trust the feedback you get from the driver. So I produce tiles manually using Photoshop's snap grid feature at a standard 256 X 256 max.