Well it depends on the type of texture, but generally I use 3d. Tiff has better quality than jpeg because it doesn't loose quality, so that'd be the better choice....but you can use Jpeg too. Yes It would be on a 2d picture frame if you imported it. But notice if you apply it as a object texture, it conforms to the object (Say a primative), Then, you could save it to your library. Regards, Matt