thysonj: do you want to rotate the image plane about
a vertical axis ? This is nothing else than a change of the
aspect ratio (e.g. scaling by sx=0.8, sy=1).
PhS has general perspective distortions, but this feature
is really bad, because everything is based on trial and error.
Or do you want to create a new 3D view ?
Some programs promise to do this, but obviously a hidden
part of a building cannot be re-constructed from nothing,
unless some assumptions are made about the 3D-elements.
Like this: the unvisible right part is a mirror of the visible left part.
---Gernot