Hi all,

I've been testing Karma on my Mac and I seem to run into an issue where the render time will slow down to a crawl when my mac turns off the display after 20 minutes or so. For example, I had frames rendering every 3 minutes and then after the 7th frame, the 8th frame would take 40 minutes and continue to grow in render time.

I was able to solve this by preventing the Mac from turning off the display and staying on for the whole render.


Is this a known issue?

Yes, I also had this issue. Your Mac goes into sleep mode where only the efficiency cores are working. The solution is to install Amphetamine, a free app preventing your Mac from sleeping. In Amphetamine you can even define custom triggers. I have setup one for the Houdini application. This means whenever Houdini is running, my Mac will not go into energy save mode.

gmarc
Yes, I also had this issue. Your Mac goes into sleep mode where only the efficiency cores are working. The solution is to install Amphetamine, a free app preventing your Mac from sleeping. In Amphetamine you can even define custom triggers. I have setup one for the Houdini application. This means whenever Houdini is running, my Mac will not go into energy save mode.

Interesting. I didn't know about Amphetamine.

Does this still allow for the displays turn off and still have all cores running?

Yes it allows to turn off displays and still keeps all cores running.