Anyone know how to get denoising to work with Karma when rendering via Husk directly?

Denoising works fine from inside Houdini with a USD Render node but exporting the scene to USD and rendering through Husk doesn't seem to do any denoising?

I can see any flags to pass to Husk to tell it to denoise. I assumed the denoising settings would be saved with the USD and picked up by Karma in Husk but I guess not.

Perhaps it just has to be done as a separate pass using idenoise or something but that would be a shame.

If you have denoising turned on in your rendersettings this should just work, no extra steps required. Maybe you have some configuration issues so when rendering through husk, it wouldn't find the denoising libraries (I'm thinking some sort of PATH). I am not sure right now, but I think the USD Render LOP also renders through husk. How are you launching husk from outside houdini?

If you are just running it via commandline you can try to do so via a houdini terminal. From the Houdini launcher, click on the little triangle next to "Launch" of your Houdini version and pick "Houdini Terminal". If running husk there makes the denoising work, its a pretty good indication there is something wrong with the way you usually start husk. If it also does not work, you might want to try and reinstall Houdini.

I set a render off over the weekend via the USD Render LOP and it hasn't denoised so you're probably right about possible configuration issues. It must have only been working in the viewport renders.
I'll update to the latest version and see if it fixes itself.

And yeah I tend to render my scenes from husk via the commandline either through the terminal or via deadline. It means not needing a full instance of houdini running and in the case of deadline it's good for render stats, managing queues and rendering separate frames with each GPU (sometimes this is faster than using all GPUs for each frame).