Nvidia Denoiser and Catmull-Rom Filter artifacts

[FaustoDeMartini]

Found this issue when trying to use Catmull-Rom Image filter to get a sharper image, but when enabling the Nvidia AI Denoiser I got these weird artifacts (Image on the right):

[FaustoDeMartini]

Quick Update, I tried with Mitchell-Netravali and got the same artifacts.

[^Lele^]

Both contain sharpening (negative) components, which may not be liked by the NVIDIA denoiser (perhaps no training?).
Try with wholly positive filters (lanczos as V-Ray implements it, area, gaussian, bicubic and so on), and see if changes the outcome.

[FaustoDeMartini]

Thanks for the reply Lele! I was looking for a sharper result that is why I was trying those two.

I wish that we had a sharpness option in the Correction Control (just like the VFB plugin). I know that is not good for animation but it's very helpful when doing stills.

[^Lele^]

We may have something when the new VFB will be ready, and if not, i hope there'll be some way to write one's own kernels (like old school photoshop) so to be able to create sharpener, blurrer and so on...

[FaustoDeMartini]

Ah great news Lele!

The plugin I'm referring to is called VFB+

It's really great and the Depth of Field is particulary helpful! Even does proper bokeh effect on lights!


I attached the UI, I have been using for a long time (and is free now) but it cannot be used if the NVIDIA denoiser is on.

Anyways, you guys should take a look:


http://www.monotoneminimal.com/vfb

[^Lele^]

Oh we have, we have.