Intel CPU AI x Corona High Quality

[PTMV]

Friends, I'm new here and I have a little doubt about which denoising to use, I always see the coolest and most realistic renders, people saying they use Corona High Quality denoising, and I've been making some comparisons with the Denoising options, the Nvidia GPU AI and the Intel CPU, these last two I get a cleaner, faster render but the textures and quality are a little blurrier, when I want to use Corona High Quality I have to use many passes to make it clean and many times I can leave it it takes so long and it doesn't get completely clean, it leaves with some artifacts, something that doesn't happen in the other two, with that in mind I made three test renders of just one cut of the render to make this comparison, my question is if I'm doing something wrong or If Corona High Quality really takes a long time? What I wanted to know is because the other denoising cleaned the image completely and Corona High Quality to clean it I would have to leave many passes which would increase my render a lot, my configuration is 32 Gb of Ram, and an Inter 5930K and a GTX 1070 ti

[romullus]

If you feel that AI denoisers are giving you cleaner result in a shorter amount of time, then you should use them. There's nothing wrong with your scene or setup, each denoiser works slightly differently and it's up to you to chose which one you like the most. If there would be only one objectively superior denoiser, then developers wouldn't bother to implement the other ones.

[PTMV]

If you feel that AI denoisers are giving you cleaner result in a shorter amount of time, then you should use them. There's nothing wrong with your scene or setup, each denoiser works slightly differently and it's up to you to chose which one you like the most. If there would be only one objectively superior denoiser, then developers wouldn't bother to implement the other ones.

I understand, in fact I don't prefer denoising only in tests, I got the same result with corona high quality, it didn't clean completely, it left with artifacts that I couldn't remove, hence my doubt.

[romullus]

I found that with Corona denoiser you must use HQ image filtering, otherwise the result will be awful, other than that, i can only repeat what i said - if you don't like Corona denoiser's output, switch to one of the AI denoisers, there's nothing wrong in doing that. It seems that at the moment Intel denoiser is majority's favorite.

[maru]

Check out the denoiser guides:
Max - https://support.chaos.com/hc/en-us/articles/4528588388113
C4D - https://support.chaos.com/hc/en-us/articles/4528591107729

You are not doing anything wrong. I would say that:
- the AI denoisers are more aggressive - they will smear all noise in your image, and some details too
- the Corona HQ denoiser is more subtle and smarter (and yes, it is slower because of that) - I would advise using it on images which are already rendered to a good quality, something like a final touch to get rid of the artificial noise sometimes visible for example in the shadows. The HQ denoiser also has a special way of treating materials with bump/normal maps and those areas may remain noisy if the base image quality isn't that good.