if you are a Vray user and like to get your Vray scene for Enscape working too? Here a little trick. For example an emissive Vray material isn't shown emissive at Enscape, since the Rhino material emissive color isn't set by VfR. But no problem - go to the material object properties and disable "plugin". Set the emissive color for Enscape like needed. Now go to the Vray menu --> tools --> material utility tools --> enable all vray materials. So, the Vray material is reconnect but without to destroy the Rhino material setup.