this home is situated in a mountain valley, and I have excellent photos of the local mountainous landscape. The placement and size of the \"backdrop\" wall, as well as the distance is something I'm spending alot of time on, and without accurate results.
are there tools for making this easier?
are there recommended limitations?
example, I've tried placing the wall about 100 feet away, 200' long and 120' high, applying a window with an outside image applied from one of my jpg's obviously doesn't produce good results

placing a 35' wall that is 25' high about 25' back, makes my image look way to \"up close and in your face\" unrealistic also.
here is a pic taken from the actual location that I wish to apply this effect.
the portion of the house you see in the pic is the room I am designing in, and the top of the ridge you see across the interstate (at the floor of the valley) is probably a couple miles -line of sight.
what would be a rough \"ballpark\" of how to set this up, so I have something to start with?