VFB not working in VIZ 4

I currently use VRay 1.09.02u VIZ 4 (XP Pro). The VFB viewport does not seem to function. What should happen when I select enable VFB and show last? When I try nothing seems to happen.

vfb has been disabled for a few releases now, I think it will make a grand re-entrance when it returns :slight_smile:

Thanks for the relpy!