How to rotate a background image 90 deg and copy it from one file to another

by John37 » Thu Sep 05, 2013 7:17 pm

Is it possible to to move my top floor design together with its background image from one SH3D file to a different file containing the lower floors so that I can combine all the floors together with their background images?

Also, is it possible to rotate the background image of the top floor through 90 degrees when I combine it with the lower floors?