Once you’ve matched the color tones in a composite photo, you can then move on to matching the saturation for proper realism. Here is a 5-minute tutorial from Antti Karppinen that shows how you can do so using Photoshop.
Here’s a 2-minute video in which cinematographer Matthew Rosen explains how he pulled focus at high speed for detergent ad. The shot was of falling detergent powder, captured at 1500 frames per second with a Phantom Miro camera.
If you take a look at photographer Charlie Kitchen‘s latest work, the images appear to be landscape photos with 3D shapes added in digitally. But appearances can be deceiving: each photo was created entirely in-camera without any help from Photoshop.