after extracting txd open it with magic TXD and see there resolutions at left side open paint.net and paste textures in same resolution and then export it as bmp and then replace it in the original txd file and then follow replace it in world img and then delete world img 1 ,2 and 3 and copy world img and paste it and name it as WORLD_1 ,2 and 3 respectively Tada!!! if you have n't done anything wrong it will work,