i agree with guslaw and wildman2. a 2d plane mapped with your image then placed strategically behind your bryce scene and aligned to it will give you the effect your looking for. matching the picture will be the toughest part and is more a test of the user than the program. depending on allot of things like color saturation, contrast and clarity (grainyness/pixelation) - it will all have some affect on how the bryce portions match the photography portions of the image.