Hair/Fur/Fine Detail Curve Denoising

[etheory]

To add another point, Animal Logic/Netflix Animation Studios struggles with fine hair/fur/clothing made from tubes with OIDN.
It either seems to ignore those areas entirely, or over-blur enough to be problematic.

We've tried switching normals to tangents (sometimes helps, sometimes doesn't).

Is there anything we could do to improve this? Do we need to retrain? Is this something that needs to be supported separately?

Thanks.