Ive experimented with typical toon shaders in cycles and eevee, but usually the color effect is very concise and not concept art/painterly:
In eevee ideally, is there a way to achieve a more concept art look like this? Where perhaps you feed in a mapped, painted material, and eevee provides toon shadows? Or a different approach?
Is a concept art shader possible?
(Image credit https://dribbble.com/monfa)