How exactly should it look like?
Probably this thread gives you some ideas how you can create something like a cartoon shader: https://forums.unrealengine/showthread.php?306-trying-to-make-Toon-Shader-Material-on-UE4 
How exactly should it look like?
Probably this thread gives you some ideas how you can create something like a cartoon shader: https://forums.unrealengine/showthread.php?306-trying-to-make-Toon-Shader-Material-on-UE4