Is there any reason the Mat. Conversion tool couldn't plug the current material into the OpenGL node? Since we don't have Octane in OGL it's hard to work on surfaces to some level and get an idea of things in Modeler. It's all WHITE by default...unless we go the extra mile and connect the nodes up.
This may not be a big deal for many...but if it's easy, it would be a great addition for my workflow. Thanks!