Hey guys,
After browsing the internet and multiple forums I finally decided to go and ask for a little help here. I’m currently trying to achieve this kind of effect (it’s a blend between my 3D model and photoshop painting). I first tried using the contour shaders but even when I use ramps or noise in the contour color the line remains flat and smooth. I then tried connecting a ramp in the shadows of my mia material but it still looks very flat…
I will have to use Nuke in the end but if you had any advices or hints/tips on how to achieve this effect, well… it would help a lot 
Thanks for reading and have a great day,
ML