Looks like some folks have been working on this with OSL in Blender and getting some decent results.

https://blender.stackexchange.com/questions/109614/fake-bool-operation-with-osl-shader

Thanks for the link.
Unfortunately while I was learning OSL basics I've found out that Octane's ...

Does anyone ever tried to create a render boole effect with OSL and Octane?
I have to render some heavy slice effects and render-time boolean might be my only option.
Any ideas?

Ok, thanks for reply.

I can't find universal material in 3.08.1-R2

We have exactly the same problem with 3.08.1-R1 and forester.
We had to revert back to 3.08, and now forester works.

win10
c4d r19.53
Nvidia driver 398.11
2x Titan x

I wrote this script a few months age to transfer values from Live Viewer to render settings and vice versa.
I'm not sure it still works but maybe it will help you find a solution.
I'm not a programmer so it could be a mess for someone who is one.

import c4d
from c4d import gui

ID_OCTANE ...

Hello,

I think you can tweak settings to achieve a cleaner result, but actually we can still notice the presence of artifacts especially in the light at low frequency temperature.

https://pix.louiz.org/o/tBAfR.png

Octane_Post_Artifacts_001_pxl.zip

Yes, it can be tweaked but it looks like ...

alecmaassen wrote:How many samples do you have?

It doesn't matter.
With more samples those artifacts are more defined.
I've tried every possible combination, it has to be some limit in calculations precision.

Post effect in octane is great, and it works almost all the time when combined with beauty pass, but in this situation it's creating those bending steps.
For me it looks like the post effect is calculated in 8 bit color space.
Could this be the reason for this artifacts?

Hello.
Is there a way to avoid this artifacts in extreme Bloom and Glare situations?