Only for blender2.8.....
Blend file and back image3.png in this zip. Include scifi mech in the blend file. Ngon,531484 verts.Not use UV and uv textures. Toon setting in the compositer editor. Please load a back image3.png.
Render time(my case) slower PC(4.00GHz 1core No GPU).....3min, faster PC(3.9GHz 2core GTX1060)......40sec memory peak 6600MB when rendering
Update toon setting ver2 ...2019/8/15
About toon render settings
Render tab....render engine Eevee ,sampling render32 ,ambient occlusion on ,film transparent on ,free style off
contex tab....passes combined on , normal on , ambient occlusion on
output tab....resolution 1920*1080,200%
materials...mecha parts---emission shader strength 1.0 ,emission parts---emission shader strength 10.0
If you use white color material ......color white HSV set v0.88