Rising Sun Pictures did lots of the VFX work in World War II prisoner escape movie “The Way Back”, ranging from bush removal to entire CG reconstructions.  In an article on fxguide, they discuss the project.

At one point there were nearly 400 shots because of things like bush removal and green suppression on desert plates. We managed to convince them that DI could handle that equally as well, so that’s where the DI house picked up a bunch of that work. So we ended up with about 200 shots in total, with about 50 being quite complex shots.

via Rising Sun Pictures finds The Way Back | fxguide.