DOF still too noisy?

Corona Corona for 3ds Max Issues
1

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.

corona_dof_noise.jpg
corona_dof_noise.jpg943×530 36 KB

3

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.

corona_dof_noise_02.jpg
corona_dof_noise_02.jpg943×530 31.7 KB

4

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

corona_dof_noise_03.jpg
corona_dof_noise_03.jpg943×530 41.6 KB

5

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

6

Sure.
corona_dof_test.zip (254 KB)

7

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.

8

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.

9

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