like this old barn, won’t have perfect angles. In this case, you’ll have to
create a second plane, entirely distinct from the original.
Setting up planes.
Once you’re satisfied with the planes, grab the Clone Stamp (fourth from
the top), and Option + click the desired source (in our case, the barn door).
Then clone the door onto the front-facing wall using the same method you
would use with the normal Clone Stamp tool. Turn “Healing” on in the
drop-down menu above the image preview to ensure that the source is
properly blended into the destination.