what is film grain in games

Film grain is a post-processing effect that adds a layer of noise to the image, simulating the look of old film stock. It can be used to cover up color banding and other visual artifacts, and can add a bit of realism to the image. Film grain can also be used to create an organic feel to images or videos, which can be desirable for some projects. However, some people find it distracting and prefer to turn it off. In games, film grain can be used to add texture effects without adding texture to the textures. Properly implemented film grain should eliminate posterization/banding in games and make the graphics look richer and more detailed.