I was looking for software that could take 2 or more digital photos and turn them into a reasonably accurate 3D model (ideally with a calibration feature which could be used when there is something of known length in the photo.) This would be for outdoor structures (e.g. houses) not for small objects. Perhaps a pair of photos each of, say, the NW corner and the SE corner of a house that could be stitched together to make a single 3D model. Needs to be something that can be done quickly, so it could be repeated for many different houses. (The models would be loaded into a shading program to evaluate the house roof's solar energy shading geometry.) Is anyone out there familiar with sources of photo-to-3D-model software that could handle this?