I have the same problem. After I updated display adapters AMD Radeon ™ R5 M330, it turned out all black in the rendered mode. Normally it should look like this:
but unfortunately it looks like this:
My display adapters:
When I deactivate AMD Radeon, then the rendered mode looks like this:
However, it still doesn’t reflect what it looks in the first image:
This is RhinoCeros 5.
Could you please help me?