As you can see, the grass (VRay Fur) is getting blotchy patches. I’ve already ruled out it bing a GI problem, as GI is turned off in this render example. Modifying AntiAliasing settings also seems to have no effect.
The only thing that I can figure is that the UVW map that is applied to the underlying object is being ignored. The only map involved is a simple bitmap applied in the diffuse slot. The underlying object has a planar UVW map.
I don’t have any W coordinates, as I mentioned, it’s a planar UVW map on the underlying object. And as you can see from the animation sample, there’s substantial per-frame flickering.
For curiousity sakes, just chuck a Box uvw map on that sucker. I probably because of the lack of W mapping thats causing the problem.
Any errors in the vray log?
So jacksc02 has been very helpful in taking a look at the scene and helping me brainstorm the problem, but together we still haven’t been able to identify a solution.
Here’s what we’ve tried:
GI - Example clip has no GI
AA - Tried different Anti-Aliasing settings, including turning AA off, QMC, and Adaptive Subdivision. Problem occurs regardless
UVW - Tried switching to box-model UVW on base object, no change. Example has simply a basic bitmap for diffuse, no procedurals (although the problem happened with procedurals as well.
Dome Light - Turned off dome light, problem still occurs.
There’s only two things left I can think of to try… and I’ll run them through today… but this is looking more and more like a bug with the UVW mapping on VRay Fur.
