OTOY Forums

Hey,

I'm using a displacement map on a flat surface to make small letter-shaped indentation. It needs to be really subtle (almos bump-like, but there will be close ups so I'd rather use displacement).

The problem is, the lower the dislpacement value, the more strange artifacts I get.
Check it out:



what's wrong here?

As the displacement amount gets smaller, the polygons being displaced need to be smaller, otherwise you get artifacts. So if you subd the mesh it should fix the problem. See point 4) in the Displacement section of the Octane Notes in my signature.

Paul

face_off wrote:As the displacement amount gets smaller, the polygons being displaced need to be smaller, otherwise you get artifacts. So if you subd the mesh it should fix the problem. See point 4) in the Displacement section of the Octane Notes in my signature.

Paul

Paul are you sure this is the case?

I've subdivided my mesh from 2570 polys on subdivision level 2, to 40.000+ polys on subdivision level 3 and this is the effect:


the render errors are still there, just smaller

It would be worth lowering the ray epsilon - just in case those artifacts are self-shadowing. If that does not help - can you package a sample up in ORBX format and send to me and I'll send it to the Octane devs.

Paul

The other options are to a) use that texturemap as bump instead of displacement, and b) scale the scene up x10 (or x100) which will most probably resolve the issue (since then the "Amount" could also be increased).

Paul