OctaneRender 2024.1.2 for Houdini production (2024.1.2.1)

[bruce.chai]

Please do - I always try to do a whole project in Octane from start to finish and I always find some little quirks like this - that make it impossible in the middle of the project.

I have raised this issue with Octane Core team, and I'll let you know once I have a reply.
Sorry for the problem.

[seesharpstudio]

Thank you - While they are looking exactly into this one - besides moving the light with heavy geo in the scene - Also it seems that octane can't load after a certain number of instances - Geo that is instanced and has emission material on it. Could you please also look into that?

[bruce.chai]

Thank you - While they are looking exactly into this one - besides moving the light with heavy geo in the scene - Also it seems that octane can't load after a certain number of instances - Geo that is instanced and has emission material on it. Could you please also look into that?

The performance issue seems to be caused by the AI light turned on in the kernel. While waiting the core team to find if this can be improved, here are two possible ways to workaround the light performance issue:
1. The slowness can be greatly reduced by turning off AI light (/mat/octane_mat_renderTarget1/Kernel/Light/AI lights). You can turn it back on for the final render
2. If the emission is weak (not obvious light and shadows being cast from the object), you could create an Emission BlackBody node and connect it to /mat/glass/Material_Standard_Surface1/emission, and change the Emission BlackBody node's sampling rate to 0, you may need to play with Emission BlackBody node's Texture value to have expected result). This will entirely remove this overhead.


can you share a scene for the problem with instance with emission material? Thanks!

[seesharpstudio]

Thank you for coming back with the solution. I appears that turning off the Ai Light also solves the problem with a lot of instances that have emission material on them.

[bruce.chai]

Thank you for coming back with the solution. I appears that turning off the Ai Light also solves the problem with a lot of instances that have emission material on them.

Cheers, good to know the instance problem can be solved by AI light too.