I posted about this issue two days ago and apparently it's something that Poser just does, but I am having a terrible time with it. Many items which use mesh in their production of an object (I use the layman's definition of that word here) give me tons of grief because of the "stitches" that show up in them. I noticed this first with a figure using a terrain morph and then started seeing it all over the place - Terradome's terrains, and now the Cyclorama environments - I'm attaching a crop of the background of one of the Fairytale Story planes:

This kind of thing ruins the render, obviously. So far I have not been able to find a render setting that gets rid of it. This one was done using the automatic settings with everything turned to the max ("Final") and I also had Smooth Polys, Remove Backfacing Polys, and Use Displacement Maps checked, for what it's worth. I thought if I set everything up high maybe the problem would go away, but no such luck.

Can someone suggest a way to avoid this? Surely it's possible or these people couldn't advertise backdrop software such as this - I know it works for somebody but I can't figure out how. I'm using Poser 8, with the latest upgrade from Smith Micro installed.