VRay - Materials - Render Only

SketchUp version : 2017Pro
Skatter version (Skatter dialog > Options > About) : 1.4.1
OS : Windows10
Description of the issue : When using Render Only feature, Materials appear white
Are you able to reproduce the issue every time? (If yes, how?) : yes
Error in Ruby Console? (Window > Ruby Console) :

Which version of Vray are you using?

This is a Vray issue, so you should post the Chaos Group forums.