"What's the best" -- questions.. are in general un-answerable.. because there is no context.. Here for example... environment for a game, for a stylistic or realistic, background (like in a martial arts fighting game) or in-game place to go.. first person shooter or RPG, multi-player or campaign.. also basic environment or…
It's all look pretty much like CelShading Toon Shading (you can google both and how it works.) with flat colours. In Arnold you have basically there a slot for Diffuse Flat Colors and can readjust color of the Shade that works something like on the screenshot. Shade color also can be connected to the diffuse color with…