We've just finished a very high resolution project (24K x 12K) using Redshift in standard Houdini. We are now investigating starting to move to Solaris/USD and whether we can use Karma instead of Redshift.
I'm running some very basic tests and already hitting an issue with even attempting to render at that resolution, as well as significantly slower render times. I'm testing a very basic scene:
- HDRI dome light
- spherical camera
- various resolutions (4K, 8K, 12K, 24K)
My benchmarks (on a 4080 super) for this scene using Redshift in a standard (non-Solaris) way are as follows:
4K
- 1.7 seconds
8K
- 5.5 seconds
12K
- 9.3 seconds
24K
- 38.3 seconds
Using KarmaXPU in Solaris:
4K
- 6 seconds
8K
- 25 seconds
12K
- 51 seconds
24K
- WON'T RENDER
First up, I'm surprised that there is such a difference in render time with such a simple scene. This is just with one primary sample on Karma, but perhaps I'm missing some really obvious render settings which should bring this down. But no matter what I try, trying to render 24K just totally crashes every time. Is there just a hard resolution limit with Karma?
Resolution issues with Karma / Solaris
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