OTOY Forums

Good morning, can somebody help me with this?

I am trying to see how the new denoiser feature works in Octane 4 for Lightwave. But to be honest I haven't had too much time yet to experiment. However I don't see much of a difference in my render when I enable the denoiser. Perhaps some setting values that others have found that worked could be shared? So far it just looks 'different' (not better) and appears to have the gamma change minimally.

Thanks!

Juanjgon can you help with this?

Are you sure you are looking at Denoised image (in IPR) ?

I see BIG difference when switching form Beauty and Beauty Denoised with default settings.

Just be sure to uncheck "denoise on completion" 'coz then it'll wait for all samples/complete render and then denoise.

How many samples/resolution is your image? I don't see much of a difference if I render a scene with 10000 samples, but I see a huge difference at say 500 samples.

mikefrisk wrote:How many samples/resolution is your image? I don't see much of a difference if I render a scene with 10000 samples, but I see a huge difference at say 500 samples.

Well tha's the point, with Denoiser you won't need to render 10000 samples but maybe 3000 to get same/similar clean image so that means you will render faster.

lightvu wrote:Juanjgon can you help with this?

If you want to attach an example scene, we can take a look at it. You should see a huge difference especially when the image has a lot of noise.

Thanks,
-Juanjo

Lewis wrote:

mikefrisk wrote:How many samples/resolution is your image? I don't see much of a difference if I render a scene with 10000 samples, but I see a huge difference at say 500 samples.

Well tha's the point, with Denoiser you won't need to render 10000 samples but maybe 3000 to get same/similar clean image so that means you will render faster.

Of course! I was just making sure he wasn't over sampling his scene.

Guys, please help. After about a year of doing mostly WebGL crap, I just got hit with a ton of renders and animations for a client... I need to hop on the Denoising Train, ASAFP, and get up to speed with this mofo!... And I have so little time for extensive research on all the ins and outs of denoising.. Some questions to start us off:

[1a] Should I absolutely disable one of my three 980Ti and dedicate it to Denoising?.. If so, would that entail disabling that GPU like so in: Plugin Options > GPUS > [GeForce GTX 980Ti] + [Use Priority], but have [Use Tonemap] + [Use Denoising] enabled, but then disabling Use Tonemap and Use Denoising in the two rendering GPUs?

[1b] Or, if everything will fit in GPUs while Denoising is enabled, should I use all GPUs - with everything enabled on all of them?.. Seems logical to me to use all if scenes will fit... Edit: My initial tests seem to yield faster denoised renders with all GPUs cooking, but since I have many, many hours of rendering ahead, I want to use the best methods possible. There must be a reason I have seen suggestions of dedicating a GPU to denoising, but this conflicts with my testings. WTF? What am I missing?

[2] Should one still have Adaptive Sampling enabled at all in PT Kernel, when using denoising, or is that futile and/or redundant?

[3] Is it possible to see denoising whilst doing F9 renders? Works great in IPR > Beauty Denoised.. but maybe I am missing something to enable for seeing it during F9...

Hi,

You can enable the denoising in any or all of your GPUs, but be aware that if you have GPUs with less memory than others, the denoising enabled on these GPUs could make Octane run out of GPU memory or go out of core. This is why you can enable or disable the denoising for each GPU. Probably you should disable the denoising in the GPU used for the monitors for this same reason ... it is going to have less memory available. But if you have a lot of free VRAM, you can enable the denoising on all the GPUs without problems.

I'm not aware of problems with the adaptive sampling and the denoising working at the same time, but perhaps other users could have more experience about if the adaptive sampling makes sense while the denoising is enabled.

The F9/F10 preview window is going to show always the denoised image, but if you want to see the denoising in progress, you must disable the "Denoise on completion" option in the Imager node. If not, the denoising is done only once at the end of the frame. Also be aware that the denoising can take some time, so for the final rendering, you should enable always this option.

Hope it helps,
-Juanjo

Hey, thanks J! If you say that F9 is showing the denoised image, I'll believe you. All I know is that while rendering, my image looks noisy, then at end it is clean as a whistle... And I do have Denosie on Completion disabled. Weird...

If anyone has done some testing on having Adaptive Sampling on in partnership with Denoising, I'd love to know.

And I imagine that some of the other Kernel settings could be dialed back, when denoising is active, but I don't which, and time is in short supply to do a buttload of testing... Anyone have any tips along these lines? We are mainly talking about outdoor scenes with strictly HDRI lighting, but lots of geo and and plenty of 2k/4k maps from Painter on stuff...