Instancing advice for Iray Rendering

Deadly Buda

The scene I created is about 1.8 GB loaded into Iray Memory. I'm using 4x GTX 1080Ti to render the scene. The computer has a Threadripper processor and 128GB of memory.

The scene has 200 UltraScatter Objects. 8x Instancing Plus objects (each instance about 10-20 pieces) and about 5 Daz Native Instancing applied.

I can render the scene at 720p using Dome Only in Iray, but if I go any higher (1080p, 4K) Daz crashes.

I set Iray's instancing option to "Memory" rather than Speed, but still getting crashes. Is there any other settings I can tweak to get this to render correctly?

Deadly Buda

Also, would it be more reliable to use duplicates instead of instancing? If I have 9GB of headroom on the GPUs, and 128 GB of memory to throw at the scene, is instancing pointless?

Deadly Buda

In case anyone is reading this in the future, I have had success now with the same scene by switching OpticX Acceleration "On" and rending in "Dome Only" up to 4k. Which is strange because generally OpticX crashes everything else I ever do. :-D