Is anyone absolutely certain of the max Vray Frame buffer size in the 2016 Demo version?
You’ve already asked this question and you received an answer. If you need a higher resolution from it, you need to buy a license.
This is SketchUp forum. No official member of V-ray or Chaosgroup is present. If you want something more than us providing you information off the web, I suggest you can contact the Chaosgroup yourself to avoid us repeating ourselves