Glossy reflection bug (?)

[ebee]

DMC 1-100 produces visible polygon edges in glossy reflections, at least in some situations. DMC 1-4 no problems (at first... see next post).

Both renders have color threshold 0,005. Metal material has 8 Reflection samples.

DMC 1-100 (vertical stripes near the left and right edges)


DMC 1-4


I attached the test scene. The lower object is just a torus and the top one is a bended box.

3ds max 2013
VRay 2.30.01

Why am I posting this? Well, we've had some problems with this before.. especially with glossy reflections that have anisotropy. In this example anisotropy didn't seem to affect the error.

- Teemu

[ebee]

Adding heavy bump (20) seems to reproduce the problem with DMC 1-4 also.

[vlado]

Have you tried turning on the "Fix dark glossy edges" option in the VRayMtl BRDF options?

Best regards,
Vlado

[ebee]

That seems to fix it almost fully. There is only a hint of the polygon structure left, which is very manageable. Thank you very much, vlado!

- Teemu

[ebee]

Well... using bump still seems to make the polydon edges visible.

- Teemu

[vlado]

Yep, VRayNormalMap might work better.

Best regards,
Vlado

[ebee]

Thanks again, that seems to fix everything.

- Teemu