MeshToonMaterial
MeshToonMaterial[]
uses lighting model for MeshMaterial to emulate cell-shading effect
Graphics3D[{MeshMaterial[MeshToonMaterial[]], Roughness[0], Sphere[], PointLight[Red, {1.5075, 4.1557, 2.6129}, 50], PointLight[Cyan, {-2.268, -2.144, 3.1635}, 50]}, "Lighting"->None]
tip
An effect comes better when used together with SpotLight and minimal ambient lighting