My OC Zeus in different lighting style. I had lotta fun
The general process I use to shade. Starting out with a base layer, then use a multiply layer above to depict the lighting. The last layer is for any extra shadow and highlights. The same process is applied with semi-real style
For a cartoony/anime-ish style, I started out with the same shading process as the realism one then tweak the color. I could have started with value and applies a color layer on top, that will be a better way of doing it.