Hello everyone,
I searched on the Internet for a solution, but I only found few topics describing the same problem, but it wasn't resolved.

It happens randomly. 1 out of 3 renders. When I go in the material editor, disconnect the map, then connect it again the warning disappears, and the scene is rendered correctly until it shows up again at some point.
The map is procedural cellular map, connected to the bump slot of a VrayMtl. The material is assigned to a sphere with a spherical UV mapping, and then the sphere is scattered in the scene using multiscatter.
Tried to disable/enable bitmap paging and it does nothing about this particular issue.
Did anyone encounter the same problem?
And while I had this post opened, I want to ask one more thing.


I have this strange looking artefacts. They look like bucketing issue of some sort. Appearing only when DOF is active.
V-ray physical camera, slight optical vignetting on the bokeh. Adaptive image sampler with 1/64 min/max samples. The threshold is around 0.06.
Both issues are on a 3ds max 2014 64 bit, and V-ray 3 EDU.
I searched on the Internet for a solution, but I only found few topics describing the same problem, but it wasn't resolved.
It happens randomly. 1 out of 3 renders. When I go in the material editor, disconnect the map, then connect it again the warning disappears, and the scene is rendered correctly until it shows up again at some point.
The map is procedural cellular map, connected to the bump slot of a VrayMtl. The material is assigned to a sphere with a spherical UV mapping, and then the sphere is scattered in the scene using multiscatter.
Tried to disable/enable bitmap paging and it does nothing about this particular issue.
Did anyone encounter the same problem?
And while I had this post opened, I want to ask one more thing.
I have this strange looking artefacts. They look like bucketing issue of some sort. Appearing only when DOF is active.
V-ray physical camera, slight optical vignetting on the bokeh. Adaptive image sampler with 1/64 min/max samples. The threshold is around 0.06.
Both issues are on a 3ds max 2014 64 bit, and V-ray 3 EDU.
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