Thanks Michael, that's great to get that cleared up.

I guess sometimes it has to be a compromise between display speed and "prettiness" of the displayed mesh. I have a situation where one element of the model involves a long shallow arc, a bit like this discussion

http://moi3d.com/forum/index.php?webtag=MOI&msg=1308.2

So the display only looks right when the mesh angle is 2 or 3. But another part of the model needed some fine filleting work which took way too long at that mesh angle setting.

Steve