Hi,
It is a bit hard to figure out which part is exactly giving you the problem
- the gray-shaded part looks a rhino geometry, that is not a GH generated.
- the yellowish-blue one looks like vertex-color mesh may be coming from GH, but not really baked
- the red slab at the bottom looks like the above but without the vertex colors.
In general rendering from GH into Rhino with V-Ray is performed in these ways
- You generate the geometry in GH, assign V-Ray materials, etc and then use the “Render In Project” component to transfer to the V-Ray renderer in Rhino
- You generate the geometry in GH, bake it and then assign materials in Rhino and render. This is the natural Rhino workflow, simply the geometry is “foreign”
- You render everything in GH
The first and third option does not allow you to specify UV maps. This is not available in GH at all. You can use other plugins like Human that allows that.
Rendering vertex colors (if that is the case) has some special handling, you need to create a V-Ray material and put a UVW texture to the diffuse slot, and assign that material to the object you want to render in vertex colors.
Please define the problem more precisely
Thanks