Thank you so much for your prompt responses, hborre and donnena-Andy.

I have tried most all of that -- including gradually eliminating dressings from the set -- and the problem still remains if I try to work in Open GL mode. In SreeD, the display's camera movement is fine. Usually no other programs are running in the BG, other than MS Security Essentials and MalWareBytes. I can try killing them to see if that helps.

Since I have more complicated sets I've built that do not display a problem, I am wondering if the issue might have been introduced when I "changed" the TerraDome2 A-Zone material. Surely, the old material is purged from the scene when you do that, right?

I don't mind working in SreeD if I have to, though it doesn't show the skydome texture.

I'm using Poser Pro 2012 64bit on Windows 7 Pro x64. I have two E530 quad-core processors in an Intel Skull Trail Motherboard, 8GB of Ram, and a AMD FirePro V7900 graphics card.

It is a bit befuddling because, as I said, other (even more complicated) sets I've built will display in OpenGL mode with no "sticking". I may try swapping-out a different material on Terradome's A Zone to see if that helps, but I've used the same one on a very similar set that has no issues.

Will let you know what I eventually discover.

Open to other ideas, too, of course.

hborre: I'll check the material map size on the A-Zone next time I open the program.