The vanishing cylinder bug trick.

 From:  Michael Gibson
2329.8 In reply to 2329.1 
Hi Danny, thanks for cooking it down to a reproducable example!

I can reproduce it with the Nov-21 v2 beta, but it seems to work properly in version 1.0, do you see the same thing over there?

So it seems to be a regression in the geometry library, but I have applied a new geometry library update for this next upcoming v2 beta and it looks like that has fixed this problem.

- Michael