Clipping mask

This mini tutorial teaches you how to paint inside an object. Clipping masks are excellent when you want to set the light and shadows to an object. To paint the highlights add a new layer above the layer of your object and "Create a clipping mask" in the layer palette sub menu or press [Alt+Ctrl+G]. Set the layer blending mode to soft light and paint with a broad soft edged white brush in the clipping mask. The white colour will only affect the object and not its surroundings. To paint the shades create a new layer, set it as clipping mask, set the blending mode to multiply, the opacity to about 30% and paint with a broad soft edged black brush in the clipping mask layer.