Greetings, I'm not sure if these are RhinoGold or Brazil specific problems.
I am running RhinoGold Render Studio 3.0 for Brazil and have a problem with my "White Gold" Material not reflecting the currently selected Environment in the render. It always reflects a Studio style environment but will still show the selected Env. in the background of the render. I tried to edit the material in the editor but do not have the experience (I'm working on it) to know what all the setting do.
Another Question: Why do only some materials show up black (blank) in the main display when selected. Silver, platinum, titanium show but the white gold and colored golds are black.
Well I don't know about RhinoGold but the deal with your first question is that there's a "reflection environment" set in the material that overrides your scene settings. If it's a chrome-based material it's under the "chrome parameters," third row down, clear the checkbox beside "Env:" to toggle the override off. If it's a "BAM" based material, then it's under Reflection Parameters.
The issue with your second question is that depending on the material it's based on, the OpenGL render preview doesn't know how to interpret it very well.