Denoise??

LM6 · June 23, 2020, 02:10:09 AM

Not sure if iam doing something wrong but in GPU mode Denoise is not being applied to the render.
Ive attached 2 renders so you can what i mean, one is a view port screen grab and the other from a render.

Using 4 x 2080 ti
Iam taking the screen grab after about 1 min which is about 6000 samples so that's what i set the render to.

DriesV · June 23, 2020, 03:50:45 AM

Hi Peter,

That seems strange.
What version of KeyShot are you running?
Note that the offline rendering is using a CPU denoiser (Intel Open Image Denoise), so it should work regardless of GPU Mode.

Dries

LM6 · June 23, 2020, 05:43:24 AM

Hello Dries..

Iam using 9.3.14
Nvidia 442.92

Peter

DriesV · June 23, 2020, 07:12:01 AM

Any chance you can share the scene?

Dries

LM6 · June 23, 2020, 08:06:18 AM

Not that one , i will try and re create with simple scene

LM6 · June 23, 2020, 08:18:52 AM

Here is a test scene will similar lighting, seems to be the ground illumination that's causing the problem.

joseph · June 26, 2020, 09:57:52 PM

Hi. I gave it a try.
abstract.060 60 sec screen shot
abstract.1436 14:36 cpu rendering
3700X with 32 GB
5500XT 8GDDR6

LM6 · June 27, 2020, 03:53:10 AM

Hi Joseph

If i use CPU as you have, the 2 images look very similar as yours do but:

Screen grab: It takes 60 seconds to get to around 900 samples in the view port
Render: 900 samples takes about 46 seconds (was yours really 14 seconds)

My CPU: 2990 WX

What samples are you getting on your renders?

On this scene iam not noticing any difference between Denoise and no Denoise on the renders

joseph · June 27, 2020, 04:58:21 AM

It is 405 samples on 60 sec. and 6000 samples on the render on file 14 mins 36 sec.
I have attached the current benchmark product by Magnus Skogsfjord
So Denoise works with AMD 5500XT gpu and cycles with idle for five seconds and denoise 1 second. The Denoise slider is maxed at 1, and can't type more than that.

Radace · June 28, 2020, 09:00:53 AM

I geto same problem even made topic about that with simple file... https://forum.keyshot.com/index.php?topic=26460.0
denoise not working when I put camera into scattering medium object, when camera is outside denoise is working on gpu

@Josept stop it, we talking about GPU mode on nvidia cards, ur post are useless....

Someone can tell me how to fix that denoise???

LM6 · June 29, 2020, 03:36:36 AM

@Dries did you get a chance to check out the scene I posted?

Cheers

Peter

DriesV · June 29, 2020, 06:10:03 AM

Hi Peter,

Yes, I did check it out this morning. Thank you for sharing.

As I mentioned earlier, the offline rendering is using a CPU denoiser (Intel Open Image Denoise) for both CPU and GPU rendering, while the Real-time View with GPU Mode is using the NVIDIA OptiX Denoiser.
It turns out that, for some reason, the Intel denoiser doesn't do a good job of removing this particular noise. We are a bit surprised by this as well, as it seems like an ideal scenario for any denoiser.

Dries

LM6 · June 29, 2020, 07:46:28 AM

Hi Dries..

Thanks for the info, that explains it perfectly.

Peter

Radace · June 29, 2020, 10:38:47 AM

And how to fix it?

DriesV · June 29, 2020, 12:17:18 PM

Quote from: Radace on June 29, 2020, 10:38:47 AM
And how to fix it?

The issue occurs in areas of the image that internally are transparent (alpha of 0). This includes: ground shadows, ground illumination and DOF against the environment background.
A solution is to put some geometry below or a around your object as a background.
We are looking into making the Intel denoiser not take alpha into account. No ETA on a fix yet.

Dries