OTOY Forums

Polarity wrote: I had tried switching to PMC but the render times jumped at least another 20 min.

But noise should go away faster.

But noise should go away faster.

Hi Karba.

Does this mean I'd be able to lower down the samples when using PMC to achieve a noiseless image? Also I need to ask....does my light samples have anything to do with it? I have always kept them at a default of 1.0.

Polarity wrote:

But noise should go away faster.

Hi Karba.

Does this mean I'd be able to lower down the samples when using PMC to achieve a noiseless image? Also I need to ask....does my light samples have anything to do with it? I have always kept them at a default of 1.0.

Yes, very likely you need less samples for pmc. Light samples don't make a lot of sense in your case.

Yes, very likely you need less samples for pmc. Light samples don't make a lot of sense in your case.

I changed the kernel to PMC and the sampling rate to 6000 just to test it. It seems as if I'm starting to see a huge improvement already. I just have to wait to see how long it takes me to get something near-noiseless. Thanks for your help!

Here is the updated image rendered via PMC with 10000 samples with 28 min rendertime at 1024x663. I replaced all the ceiling lights with blackbody emitters and actually have a cleaner result in quality and noise. Huge improvement, but still not amazing time-wise. I feel this is somewhat workable now and can definitely add a denoiser in post, but it's higher resolutions I am more worried about. Do I have any options in regards to doing further optimization or is Octane not yet completely interior friendly?

buy a system with 4 gpu, this is the only way

Imagine to render this scene with vray and bruteforce set to 24 - 3
also set dmc sample set to 1 - 16
also noise threshold set to 0.005

your system will render for 8 hours, more or less.
I don't see any noise in your render, it's ok.

Btw, every photographer that shoots interiors always use a lot of tricks, flashes, lamps, banks, post-production, etc.

The most powerful ccd sensor generates grain in low light conditions (Hasselblad).

Imagine to render this scene with vray and bruteforce set to 24 - 3
also set dmc sample set to 1 - 16
also noise threshold set to 0.005

your system will render for 8 hours, more or less.
I don't see any noise in your render, it's ok.

Btw, every photographer that shoots interiors always use a lot of tricks, flashes, lamps, banks, post-production, etc.

The most powerful ccd sensor generates grain in low light conditions (Hasselblad).

My motherboard supports 4 GPUs but heat is something I'm worried about. I would have to spend some money and resort to liquid cooling unfortunately. I tried using 3 cards in there already with their stock coolers and the heat was just way too high, even with my well ventilated case. I was extremely scared for my hardware.

Polarity wrote:..... I feel this is somewhat workable now and can definitely add a denoiser in post, but it's higher resolutions I am more worried about.....

i am using this technique too, since i read about it here: http://render.otoy.com/forum/viewtopic.php?f=21&t=878
it´s definitely worth it! why worry about higher resolution? you get much more detail and de-noise it later. even if you double
the render size, you still get better results in a reasonable amount of time...

gabrielefx wrote: 01 tiny geometry/light emitters generate too much noise. Try to enlarge them or balance them increasing samples.

In my scene http://render.otoy.com/forum/viewtopic.php?f=27&t=27515
i am using IES lights and skylight through a relatively huge opening without glass.
Any idea why the image got sooo grainy?

gueoct wrote:

gabrielefx wrote: 01 tiny geometry/light emitters generate too much noise. Try to enlarge them or balance them increasing samples.

In my scene [url]http://render.otoy.com/forum/viewtopic.php?f=27&t=27515
[/url] i am using IES lights and skylight through a relatively huge opening without glass.
Any idea why the image got sooo grainy?

IES is very noisy