Sounds like a great idea - I'm suprised anyone would be interested.
Constructing the cave entrance only took about 8 hours,( less if I didn't have to wait for glue to dry) and I have the exact elements I need for the shot. I can photograph it from different angles and in different lighting situations.
I even reused parts for the painting in this post-
along with some other miniatures I constucted.
One tip-a lot of these miniature construction techniques were learned from various model-railroad magazines and books...