Background replacement is one of the most common techniques in commercial, advertising filming.
Cleaning objects, eliminating unnecessary details (reflections, glare, debris, scratches) is just the start in the processing of such pictures. In order to make the photo montage look as believable as possible, it is not enough just to carefully set the background. In the work there are necessarily such photomanipulations as: drawing chiaroscuro, adding actual reflections, textures, sharpness, general and local color correction.
Each such picture is creativity multiplied by high professionalism and many hours of expenses. A similar commercial retouching is calculated in each case separately and the processing of such projects starts from 100$.