@Lupinos
Thank you for straightening out my questionmarks and explaining the process. Very informative!
Since I am using GIMP it's a little different but the "tilt tool" you are refering to is probably called "shear tool" in gimp. It tilts the picture in the right angle but unfortunally the quality in my experiment was extreamy blurry - not as crisp as yours. I wonder if there is something I can do about this or if Photoshop just have the superior algorithm for tilting pictures? ;)
I was looking into doing the other roofs myself that you didn't do (yet?). But I am stuck using GIMP for the time being so if the cold hard facts are that photoshop will do it much better no matter what, then I might as well wait for someone else to do it or me. Or, worst case scenario, do it myself in Photoshop in the future.
[EDIT: The loss in quailty might have been because I tilted it at a -90° angle, but the reason I did this was that -45° angle was not nearly enough to get the kind of tilt that you achived in your finished work. This should not be different no matter what software you use since it's math which makes me confused. :headshake: ]