Issue is that a scene that renders fine on four other, nearly identical, PCs, but on my fastest PC something weird happens with the firefly render. Only started a few days ago.

• IDL and SSS passes work fine
• main render slows down to a crawl when there's 30% left. CPU speed goes down to something like 10%.

Setup:

• Exact same scene works fine on four of my other PCs. Same harddrive / runtime setups. All Poser Pro SR8.
• Issue doesn't seem to do with platform. All my PCs are i7, three windows 7 two windows 10. The PC in question is a w7.
• Memory RAM seems to work fine. Loads up without a hitch.
• Only difference is that this machine is 4.2GHz Keby Lake but with W7 (others are 3.8GHz-3.4GHz). Keby Lake was supposedly designed for w10 (which is probably just marketing BS since it works completely fine on w7). Never had this issue before with Poser or any issue with other apps or games on this machine. Machine rarely if ever crashes. It did hang two months back, but that was a first.
• Did swap out a dead HD about a month ago, new HD seems to be working fine. Been rendering without issues since then... except for now.
• Scene includes animated lights (colors)
• Scene has over 15 characters, all their clothing and hair, and perhaps a hundred props.
• I did load a new prop around the time that it started occurring. Poser does sometimes throw an issue with certain props, where the render shows anomalies. Removing them, or changing the materials sometimes solves the issue. But on the other PCs this doesn't seem to be a problem.

Very random issue. Any ideas?

PS: I recommend a separate techical Poser forum, or is there one already?

"The fool is not the one that does something foolish, but the one that does nothing at all."