I'm trying to recreate this 14:12 roof. I have the floor plans but not the elevations. Can it be done auto some how?   In this case I broke the upper floor wall at points where I guessed it might instersect the top of the second storey wall, then edited (including the pitch) and extended the 2 gable roof planes down past the second storey walls to the main storey.   But it was a bunch of trial and error rebuilding the roof planes( so I did not have to manually edit the roof p