3D outlines around objects are an increasingly necessary effect in the visual language of modern 3D video games because increases in post-processing and shader

3D outlines around objects are an increasingly necessary effect in the visual language of modern 3D video games because increases in post-processing and shader tech have made it such that it's hard to identify individual interactable objects in 3D space in increasingly photorealistic environments. the article shows some examples of how this can be used, including the The Last Of Us "rough outline of figures that you can sense behind walls" effect.