Ok; those plug-ins actually ship with Rhino. We haven’t gotten around to adding them to the list of know plug-ins so the PlugInManager knows what to do. Snapshots must be printing this to the command line (@andy just an FYI that it looks like snapshots may be printing some debugging information in the WIP).
Thanks for sharing the videos. It definitely looks like there is something in our shaded mesh OpenGL shader that your GPU does not like in the WIP. I don’t have a solution yet, but hopefully we’ll figure out what is going on soon.