Final answer:
Pixel shading can simulate depth by controlling the direction of light and creating shadows. This manipulation of pixel shading gives the appearance of 3D in a 2D image.
Step-by-step explanation:
Pixel shading can simulate depth by controlling the direction of light. When light hits something solid, a shadow is created by blocking the light. Shadows give the appearance of 3D. By manipulating the shading of pixels on a screen, designers can create the illusion of depth in a 2D image.