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Simply put, I'm using two color ramps to add a texture X distance from the cartoon shadow and trying to subtract from the more horizontal parts of the shadow using True Normals as FAC, the result is fairly messy and I figure compositing might be a bit more controlled. This is in an attempt to mirror an art style, I need to be able to not use this noise texture at specific angles of the shadow and I really don't know how I'd be able to obtain this factor outside of normals, which have not worked particularly great so far.

Example:

enter image description here

Red = Texture, Black = Shadow - using 2.8 EEVEE

New Example: Trying to get sharper, more accurate results, rather than a blurry mess at some angles.

enter image description here

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  • $\begingroup$ Do you want the texture to fill the white part or to follow the shadow edge? $\endgroup$ – lemon Oct 16 '19 at 9:55
  • $\begingroup$ The texture would only be visible at a specific angle within the white part (the red line = texture, as you can see it stops towards the upper-right). Using normals as FAC did not seem to work for this perfectly. I'll have to check on this again in Blender since it's been a few weeks. $\endgroup$ – InTheBeef Oct 16 '19 at 10:30
  • $\begingroup$ Could you give an example of the art style? $\endgroup$ – Robin Betts Oct 18 '19 at 19:08
  • $\begingroup$ The example is given in the picture directly above. Certain angles of shading are fuzz, other angles fuzzless. $\endgroup$ – InTheBeef Oct 18 '19 at 20:59
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If you use the Shader to RGB node combined with Greater Than node. You can differentiate between light and shadow to create a cell-shading effect.

cell-shading with Shader to RGB

Simply add a texture to the original Diffuse BSDF, to texture the transition between light and shadow.

material setup

This is how the effect looks in motion.

movement of the shadow

You can sharpen or smoothen the shadows edge by decreasing the lamps energy, increasing its radius and lowering the threshold of the greather than node.

shadow edge

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  • $\begingroup$ That is nothing short of freakin' awesome!!! Starring this question for later use :) $\endgroup$ – Moog Oct 18 '19 at 22:18

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