Hello,
I’ve been trying to fix the problem of having only some objects rendering black in Vray for Rhino. I read some forums saying it could be the case; I tried fixing it that way but the problem persists. I also tried recreating the geometry. When I do so, it appears as white in the render, but as soon as I apply a material to it, it becomes black again. Can someone please tell me what’s going on?
test 2.3dm (8.4 MB)
Hello- in Rhino, without Vray, changing the material to a physically based one allows the rendering to look correct.
-Pascal
When I did this it completely messed up the scale of the texture on my objects. Different objects had different sizes. Also, I could no longer edit the material in Vray. Is there another way around this issue?
You’re using a Cosmos material that apparently got modified in a very strange way.
First thing first:
Cosmos materials are imported as regular V-Ray materials, not as black-boxes. The .3dm file you supplied had no textures aside, so I assume the files are on the disk? I had to relocate them on my end.
Second.
The material differs from the official version in the cosmos database, although the version hash is the same, so I assume manual modification ?!
Both the diffuse and the normal bump have tri-planar textures with black set on the Z axis explicitly
and this is what you get:
quite as expected.
You shall either specify a texture for the Z direction, or set the tri-planar texture mode to “One Texture” (as it is in the bump slot), which expectedly fixes the problem:
Unless the modifications are on purpose, I suggest you re-download and re-apply the Cosmos material.
Hi Nikolay,
I appreciate the thorough explanation. I used to do the mapping directly from Rhino and recently started using Triplanar mapping more. I believe I changed something along the way – quite possibly the One Texture option you mention. It’s good to know this, so thanks again.
