Why is my rock missing when rendered with Vray?

This happens with SU 20or21 with Vray 5 latest version. The rock was a .skp file downloaded from skatter and imported into SU. The table came from the warehouse. Vray settings at default. rock missing.skp (1.9 MB)

Must be a Vray thing. It shows up in Kerkythea. Looks like it’ll make a nice enough rock, too.

The rock was a solid group inside a component. I exploded the unnecessary nested group and the object appeared in the render. I am still trying to figure why.

Thanks Anssi That was driving crazy. Exploding the group was the last thing I would have thought of. I did try several other things… The exploding worked, I will remember that.