Integrate Architectural Items into Each Other, Regardless of Angle

Submitted by SeriousDesign » There have been several times when I've needed to combine a photo taken at one angle, with a photograph taken from a slightly different angle. The complexity of coming up with an acceptable end result increases with the differences between the angles of both pictures, as well as the lighting (and the resulting shadow incompatibilities.) In this example, we're going to take a stained glass window from a cathedral's interior, and integrate it into the exterior of a different cathedral.