Can Denoiser Be Restricted to Certain Objects?

[leejk]

Hello,

The search is terrible here, so I apologize if this has been asked/answered. In my current project there is a need to limit the denoiser render element to only certain objects in the image. Is that possible?

thx

[^Lele^]

You can render a masked sequence, and recomp it.

[leejk]

You mean using the mask in something like After Effects? I thought of that but was wondering if it were possible to do with the denoiser tool. Else I got to buy a denoiser plugin for AE.

[^Lele^]

I mean rendering a sequence with an object mask (in the render settings), and a second one without.
You'd then simply comp the two in any other package.
Overloading the denoiser with the same settings available elsewhere seems to me overly messy, but the devs may disagree.

n.b.: the non-denoised will have the "true" mask borders.

[leejk]

That would work, however my render time would be too much. Currently each frame is taking 1.5 - 3hrs, so would not want to render it twice. I will likely have to just decrease my noise setting and live with longer render times.

[^Lele^]

The rendertime of the two sequences will not be exactly that of A+B, granted, but it won't be much higher either, in most cases.
If you're strapped for time, and need a higher amount of noise to make it through comfortably, then try the standalone denoise in multi-frame mode for the very best results we can offer (exe file sits in the \bin folder of the v-ray installation, and has a GUI).

[leejk]

Actually I would not need to render it twice; if my first render has the right render element mask included, then all I need to do is make a copy of it, run it through the denoiser tool, then composite it with the copy. That should work, right?

[^Lele^]

yes it should.

[leejk]

Thank you for giving me ideas!

[^Lele^]

You're very welcome, and ready to take on different avenues, chapeau.