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Shaders in Unity are programs that run on a GPU (graphics processing unit) Shaders calculate the appropriate levels of light, darkness, and color during the rendering of a 3D scene. In hypercasual games, shaders are widely used to make a prototype or full game scene look good. The range of achievable effects is huge — from basic lightning shades adding to an X-ray view or cartoony outlines. The basic rules for setting up shaders will help to make the prototyping process faster.