In this chapter
Shadows set objects into their surroundings. Often a client will ask to me create a shadow where one doesn't currently exist (because an object has been close-cropped onto a blank background) or fix an existing shadow that looks out of place (because an object has been cropped out of its natural environment and placed onto a new background). Or perhaps existing objects in the new scene may affect the way a shadow interacts with its new surroundings. When this happens, it is typical for an object to look out of place in its environment. Retouching can "fix" reality.
In a typical production environment, you might encounter a variety of these types of retouching scenarios: taking an image that was shot in a studio and placing it into a natural outdoor scene; dropping an image into a scene with a different background altogether, which may have been lit differently; cropping an image from an outdoor scene and bringing it indoors. In each case, the color and look of the shadow may have to be adjusted to reflect the changes in the color or feel of the image being brought in and its new surroundings.
Creating realistic shadows from scratch can present a real challenge. First of all, you have to create something ...