When I attempt to select a surface to analyze curvature, using Analyze > Surface > , my surface goes blank as soon as I select it.
In other words, when using Curvature Analysis, Environment Map, or Zebra, I can see the effect at first, but then as soon as I select to Revolve, the surface goes blank with only the border showing, and none of the effects are visible. When I deselect, it goes back to normal.
This is true for surfaces or polysurfaces. I’m using Rhino for Mac v5.3.2 .
Any help much appreciated!!