Ho do I find the opening in an “open polysurface?” This happens often when I’m working with screw threads. I never create them myself and often the imported threaded object turns out to be open polysurface. Cap sometimes fixed it by not always. Usually, I just trash it and find a better model. At any rate, here we are again.
I looked under analyze, but could not fins an obvious tool to highlight the opening.
Open.3dm (906.8 KB)