Fog color artifact visible when using VraySun and No Refraction

[dlparisi]

I've noticed what I think is a bug when using a non-white fog color in the vraymaterial and a vray sun. The edges of the shadow start to pick up the Fog color on the facets of the mesh. It's even visible when the refraction is 0 (black) and I presume the fog should be ignored. Adjusting the bias on the sun shadows does not affect this. I have not been able to get this to reproduce using a regular light. Easy enough to fix in scenes that don't need the fog by just setting the fog color to white, but how would you address this if you needed the fog color to be non white. See images below and attached scene. I've attached the raw lighting pass what shows it a little more clearly but it shows up in many other channels as well.

RGB Pass:


Raw lighting:


Material:


Fog Bug.zip

P.S. Can you tell I have some downtime?

[dlparisi]

I forgot to mention that obviously these artifacts are happening on the individual polygons of the surfaces. Turning off smoothing results in a faceted surface as expected but also removes any of the color/fog artifacts. Just an FYI.

[Miro]

Thanks for pointing this out.
We'll log a bug report and will post here on any updates.