OTOY Forums

Hey folks!

I'm using Octane since 2-3 weeks, as my render engine for sketchup.
Honestly, it's awesome!

After a lot of twicks, tests and tons of renders, I'm still struggling with the noise in my scene. I see what you guys can achieve with Octane, I'm pretty sure there's something I'm missing.

Can you please tell me what you think of that first test? What can I do to improve it?
It's a difficult light setup (coming in front of the cam, and the light/shadow aeras that I need to balance, it's a quite difficult scene for a beginner like me

Pmc kernel 24000 samples. 10 hours to render at 1200x1200 on 1xGTX580. I'll post my settings right after so you can analyze them

(I didn't retouch anything so you can judge the Octane output)

Thank you very much!!!

Here are my settings

All the light in the kitchen is indirect light coming from the lounge, which makes this scene hard to render.

direct_light_importance in the PMC kernel settings should be at its default value of 0.1 . It regulates how much calculation is spent on light coming directly from the emitters. Increasing this value can reduce the noise in scenes with a lot of light sources, but in your scene the main problem is the indirect light in the kitchen.

Did increasing exploration_strength result in less noise?

--
Roeland

Thanks for the hints!

I'll let you know as soon as I'll get my PC back from the "garage" (to pimp it for Octane
Thank your
g

did you try putting lights on in the kitchen, like under the cabinets? Maybe even very low lights there will add enough bounce light to help that clear up faster.

This is one reason I've largely stopped using Octane for more computationally intense scenarios - the noise clean up time is exhorbitant. Beautiful render by the way, you might want to try the old trick of rendering at a multiple of the desired final image resolution and then scaling the image down to make the graining less apparent.

Max Depth value of 24 seems to be too high and might be the primary reason for the noise not cleaning up.
The default value of 16 should be good enough although you can safely bring it down to 8 or might even try experimenting with 4.

Awesome image btw!

Just wondering gnamouric, how did you achieve such a well lit dinning area with only the sun? I struggle to get strong, even ambient light.

Light set up?

Thanks

Sixthlaw

anuraag wrote:Max Depth value of 24 seems to be too high and might be the primary reason for the noise not cleaning up.
The default value of 16 should be good enough although you can safely bring it down to 8 or might even try experimenting with 4.

i totally agree!

Im rendering a FULL HD animation of an interior pool scene atm - basically one of the hardest setups for an unbiased render-er - I found the biggest help to get a good image was

1) reduce bounce ( max depth ) to 8 as posted above. 8 is enough and will speed up render.
2) I'm assuming your using PMC as your render kernel.
3) Take max rejects down to 100 ( from 500 ) this will 'bias' your render more but it will clean it up faster so you can either have more samples per time or reduce the samples for any set time.
4) adding some lights on in the kitchen with definitely make a difference - if you want to make that choice.
5) check that you dont have any pure white surfaces using RGB 255,255,255
good luck!