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Distinguished Contributor
Posts: 120
Registered: ‎01-13-2009

Dirt in Corners effect

33 Views, 2 Replies
06-13-2012 01:15 PM
Seems like I ran across this awhile back, but I can't seem to find it now.
Isn't there a way to accentuate darkness in the nooks and crannies of, say, a furniture piece. Sort of like ambient occlusion, but more pronounced, as if there was accumulation of dark stuff there.

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Distinguished Contributor
Posts: 163
Registered: ‎11-06-2007

Re: Dirt in Corners effect

06-18-2012 04:25 AM in reply to: dlhartley
Invert the normals of your model and then bake an ambient occlusion texture and use that as a mask or whatever...
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Active Contributor tim
Active Contributor
Posts: 38
Registered: ‎05-07-2012

Re: Dirt in Corners effect

06-18-2012 06:28 PM in reply to: dlhartley
Hi David

As Wobi said ambient occlusion will help you achieve this effect. Ambient occlusion (ao) is basically a shader which applies shadow to an object according to its proximity to another objects - your described nooks and crannies are in close proximity to other objects and therefore will be more shaded.

I just did the quick test which you can see below - the material for the teapot on the right has a Mental Ray Ambient/Reflective Occlusion map as a mask on a Blend material. You can achieve the dust effect by reducing the samples in the ao map.

Hope this helps!!

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