Chaos Corona Forum

Chaos Corona for 3ds Max => [Max] Bug Reporting => [Max] Resolved Bugs => Topic started by: loocas on 2012-08-28, 13:37:52

Title: DOF still too noisy?
Post by: loocas on 2012-08-28, 13:37:52

Can anyone help getting rid of noise when using DOF?

I let this super simple scene rendering for 20 minutes and the noise in farther areas is still too strong.

Almost everything is set to defaults in Corona.

Title: Re: DOF still too noisy?
Post by: Ludvik Koutny on 2012-08-28, 14:03:12

Both primary and secondary GI at PT and GI samples at 4?

Title: Re: DOF still too noisy?
Post by: loocas on 2012-08-28, 14:41:27

Quote from: Rawalanche on 2012-08-28, 14:03:12

Both primary and secondary GI at PT and GI samples at 4?

Nope, the default: primary - PT, secondary HD Cache, samples at 16. Also, I'm using a box image filter (width 2, blurring .5)

Here's a render that took 40 minutes to render.

Title: Re: DOF still too noisy?
Post by: loocas on 2012-08-28, 15:02:36

GI secondary and primary set to Path Tracing, gi samples set at 4. Way too noisy for a 20 minutes render.

Title: Re: DOF still too noisy?
Post by: Ondra on 2012-08-28, 21:09:47

Hi,
I'll look into it when I have some time, can you send me this scene in the meantime?

Title: Re: DOF still too noisy?
Post by: loocas on 2012-08-28, 22:14:18

Quote from: Keymaster on 2012-08-28, 21:09:47

Hi,
I'll look into it when I have some time, can you send me this scene in the meantime?

Sure.

Title: Re: DOF still too noisy?
Post by: Ondra on 2012-09-14, 22:51:13

I've made some improvements in DOF sampling, but its still quite slow in this type of scene - blurring directly visible lights will probably always be hard. Also, to get best convergence, don't use custom bokeh shapes with gray values, only black & white. In the example you are using colored one, which gets translated to gray. Espetially shapes with very dark gray would take ages to clear up.

Title: Re: DOF still too noisy?
Post by: Realish on 2012-10-25, 17:06:40

Has Corona been updated using the Embree 1.1 code posted August 2012?
It says it improves on motion blur which I would figure is close to DOF.

Title: Re: DOF still too noisy?
Post by: Ondra on 2012-10-25, 17:41:36

Quote from: Realish on 2012-10-25, 17:06:40

Has Corona been updated using the Embree 1.1 code posted August 2012?
It says it improves on motion blur which I would figure is close to DOF.

Yes, it builds the structures much faster, but there is no improvement in DOF, since it is completely different problem than MB...