at Rhino 5 I can assign materials per Vray render plugin and go to the object material properties and disable “plugin”. Than I can edit basic material properties, so that my Vray material looks good at Enscape too, and switch back to “plugin”. So, I can render my scene per Vray or Enscape, both are good looking.
At Rhino 6, if I disable the “plugin” flag option, than the flag option is removed from the UI and I can’t switch back to “plugin”. Please bring the option back and allow to use the old double way.
Attached an example - here I assigned a red plastic per Vray, but I can change the color at the basic Rhino material options. This example makes no sense, but for example useful is to add an emissive color so that Vray emitters are emitters at Enscape too. Also the reflective parameters are not right set by the Vray plugin and so the correct look can be adjusted.