Photo retouch is an amazing thing, combine it with 3d rendering tools and the options are almost endless...

hover over the image to see the end product

Photograph by Ian Bradshaw, Building proposal by Mady Development Corporation.

Digital photography of planned construction site. 3d Rendering of planned building - accurate to 1cm in 1800. Removed signs and hydro lines. Created a composite of rendering and photograph. Added Grass, Leaves, Cars and people. Print on high gloss photo paper.