The problem is that there is a random variation when Indirect lighting is calculated. For animation you should instead use an IBL light. Bagginsbill has a free IBL generator that will allow creation of an IBL map from a Poser scene...

https://sites.google.com/site/bagginsbill/free-stuff/genibl---ibl-generator

----------------------------------------------------------------------------------------

The Wisdom of bagginsbill:

"Oh - the manual says that? I have never read the manual - this must be why."
“I could buy better software, but then I'd have to be an artist and what's the point of that?"
"The [R'osity Forum Search] 'Default' label should actually say 'Don't Find What I'm Looking For'".
bagginsbill's Free Stuff... https://web.archive.org/web/20201010171535/https://sites.google.com/site/bagginsbill/Home