Editing Cel shading (section)

== Basic process ==
[[File:Particle in a box cel shaded.png|thumb|Cel-shaded rendering of two [[isosurface]]s of the [[probability amplitude|probability density]] of a [[particle in a box]]]]
The cel-shading process starts with a typical [[3D computer graphics#Modeling|3D model]].  Where cel-shading differs from conventional rendering is in its non-photorealistic [[shader|shading algorithm]].  Conventional smooth lighting values are calculated for each pixel and then [[Color quantization|quantized]] to a small number of discrete shades to create the characteristic "flat look", where the shadows and highlights appear as blocks of color rather than being smoothly mixed in a gradient.