Apologies if this is a bit basic - I’m going mad. I have also searched again and again on this forum but I am clearly using the wrong search terms, but where is the ‘convert to vraymesh’ button/option? On max 7, I used to just right click on an object and it’d be there.
OK - sussed it. I installed Max 8 and then put on Vray 1.48.03 without bothering to first install 1.47.03. Now that I have installed the older version, and then the newer one over the top, it works fine.