Post-processing shaders are a computer graphics technique with low computational cost used to create image treatment effects that are applied over a scene. This project s objective is to use the Unity Engine to create post-processing shaders of non-photorealistic effects that have a low computational cost. We chose to create the effects of toon shading, hatching and outline, because they help to concretize very appealing stylized aesthetics. The toon shader makes 3D objects seem flat drawings; hatching simulates for 3D objects the traditional drawing shading technique of hatching; outline draws a contour on a scene s objects. The shaders produced in this project had great results, having imperceptible impacts in the rendering s performance, proving that post-processing shaders are a very powerful, low computational cost tool. The shaders we ve developed can serve as a base from which to create similar effects, as was done with the toon and hatching shaders, that share a lot of their code. There s also interesting options to be explored with the outline, like trying to create different styles of contouring.