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I'd like to shade the edges of my objects darker, like a toon shader, based on abrupt Z depth transitions to neighboring pixels -- in other words wherever the Z gradient is high, darken the image. I imagine that can be done in the compositor (?), but can it be done in object space in the material shader editor?

Something like this (not from Blender): Real images on left, Z-edge shaded on right

GaryO
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  • Can you show an example of result? – Carlo Jan 19 '21 at 20:31
  • Added a couple of samples of what I'm looking for. – GaryO Jan 19 '21 at 20:50
  • Have you tried freestyle? – susu Jan 19 '21 at 20:54
  • https://blender.stackexchange.com/questions/192498/is-it-possible-to-create-realtime-outline-effect-in-eevee-only-with-shaders/192538#192538 – susu Jan 19 '21 at 20:56
  • I have tried using Fresnel but that's only based on the normal (dot product of normal and eye vectors), not Z distance discontinuity, so it doesn't pick up edges of a flat object. Works OK for spheres though. – GaryO Jan 19 '21 at 21:13
  • I've tried enabling Freestyle but it never seems to do anything. Probably something I'm missing in the setup? – GaryO Jan 19 '21 at 21:19

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