The simulation of light and illumination in games, including its interaction with the environment. A core element of games that can bring out vivacity into otherwise static worlds.

Questions with this tag deal with the positioning and utility of light sources, the different methods of providing light into a scene, and special effects that can be done such as coloration and glow. While much more prominent of an issue in 3D games, there is equal potential for creativity in the realm of 2D games.