Very odd since i haven't run into this in some time and now its happening regularly.  I updated my video drivers to the most recent, and right now I'm on a laptop with an RTX 3080 so it can't have anything really to do with the contents of Chief's official article on the matter.   Troubleshooting 3D Camera View Display Problems in Chief Architect   Has anyone been experiencing this lately?  Like I said, it just kind popped back into existence for me.