Marco Fontan

This is a major bottleneck for me as well. It would be great do see some development here soon otherwise I wont be able to use karma xpu on commercial projects based on that single limitation

If I turn down the spread value in the karma tab of the light the specular of the objects gets weird and kind of black.
Does anybody know whats going on here? Seems like a bug and I am gonna file a bug report but wanted to doublecheck if somebody has a solution to this.

Hi David, thx for the tip.
This is also seems like a workaround that improves the performance a bit Similar to what I do at the moment:
Things work snappy when I make the Renderwindow quite small (about 1/4 of my 4k monitor).
I don't have this issue when I make interactive renderings with mantra or redshift. There things stay perfectly snappy while rendering in full resolution on one 4k screen interactively.

Strangely I just found out that things run better on my second, much slower machine (a 2012 Mac Pro with dual 1080p monitors).
So maybe this faulty performance only occurs on certain type of setup combinations?

My main workstation setup is a threadripper pro 32core with rtx 3090 + gtx 1080ti, dual 4k monitor setup, 256GB ram, windows 10 pro.

Best, Marco