ive brought somebody elses max model into my scene. it renders fine-ish, but all the swatches in the material editor are shown with no texture map. i can see there is a texture map in the slot, its found the file, if i go into the texture, it shows in the swatch, but when i go back up to the main material swatch, no texture shown. its like the tickbox next to the map is unticked.. but its not.
they also refuse to show in the viewport.
if i create a new bitmap texture and reassign the map it works fine, but there are probably 100 materials in there, and like i said, it seems to render ok. does make adjusting mapping and materials a right pain though.
If you are using the Material Slate please check whether you have the Teapot button on the left-bottom corner enabled. Or try to enable -disable it.
In case you use old Material editor try to go to: Material>Show Material in Viewport as>…without maps and then choose Material>Show Material in Viewport as>…with maps to see whether the textures will get updated.
Moreover try to use the “Reload” button in the Bitmap map.
Do you know with which V-Ray version was the imported file created?
Is this just with VRayHDRIs or bitmap nodes? I have a few times seen this with VRayHDRI, and I think it had to do with the tile cache. I seem to recall one render with clear tile cache on render end solved it.
ive sent an email to support with a single object from my scene that exhibits this behaviour.. im sure its one of those things, youll open the file and it will be fine