Strange things happening when some objects do not have any mapping. Please see the video and file attached. Textures flicker and change their behavior when seemingly unconnected geometries are edited.
texture mapping problems.3dm (1.6 MB)
I’ve experienced a related bug, that includes the phenomenon of Rhino’s default studio environment “RhinoStudio.exr” mapping onto objects along with materials flickering, and reported it in this thread.
I was able to solve the issue for myself by switching from an AMD graphics card to an NVIDIA.