Light cache Freezing.....Again!

[gadzooks]

I have rendered this scene all day without problems. Now the light cache is freezing. I have read thru several post but no help. What is the main reason for this problem. I had this problem several monts ago and even sent a file to Vlado but no word on what was causing it. Now its happeing agian.... Help!!!!!!
All lights are vray all materials are vray mats?
http://www.collinscoopercarusi.com/3DPosts/vraylog.txt

[Morbid Angel]

do you have displaced/sss surfaces?

[gadzooks]

Thanks for replying. I have Displacment on a carpet material. But no ss displacment.

[Morbid Angel]

displacement could be partially involved, but its hard to say without looking at the scene.

[DaForce]

Do you have any glass objects, that could be occupying the same space or very close.

I seem to remember something about a similar problem that involved glass object which was freeze the lightcache calc.

Maybe try removing all glass objects (if any) and try to render.

..... i think this was the thread
http://www.chaosgroup.com/forum/phpB...cache+freezing
Not 100% sure tho

Also make sure your not lowering the visibility property of an object below 1 for any reason.

[ngrava]

So far in my experience, the freezing light cache issue has been related to running out of memory. For me, this is usually because of trying to render images that are larger then 2K and involve displacement.
My theory is that dynamically generated geometry (as is generated while subdividing polygons for displacement or smoothing) can get so massive because we're not just generating the geometry for a single bucket, we're generating it for the whole scene at once because the Light cache doesn't use buckets.
The solution for me was to lower the Max subdivisions by increasing the max edge length in the displacement settings. It's usually set for 4 pixels so cranking it up to 7 or 8 can reduce the amount of excess geometry generated.

Hope this helps.