DoF & MB noise

[maru]

I think adaptivity in progressive mode could help here. It was available in older versions of Corona and AFAIK it's still accessible somehow via string options but I'm not sure how. You could for example set gi/aa to 2 or 4, let it cook for a while and then adaptivity comes in, it only refines edges with really high noise threshold and it puts A LOT of samples into these pixels.

[fobus]

Anyone knows how to enable adaptivity in progressive mode? And why it is hidden?
May be Ondra can help us to find out how to use it...

[juang3d]

Fobus put the initial samples to something like 6 and try the passes to 6 also, lets see hat you get then, using pretty high initial samples with bucket mode is counter productive I think, think that the increase of passes in bucket mode is not lineal, so you don't have to start with something like 800 passes, that won't help.

Also, can you share a sample scene to try it here?

Cheers!

[fobus]

Sample scene in first post.

6 samples and 6 passes give us very rought result. Even 16/8 not acceptable...

[maru]

No. You need LOTS of AA samples for clean DOF. But you don't want those samples for the whole image.

[borisquezadaa]

Even 6202 passes can't clean that image. I'm trying hard using no cheats at all.

[fobus]

I can't clean it with 6202 passes even with GI/AA samples increased to 16 (but it has nothing to do with AA I think). But time to render frame is countless with this setup, so I rendered region only.

[fobus]

Only 60.000+ passes can clean it :)

[blank...]

Only 60.000+ passes can clean it :)

But, that is still not clean, compared to result i got with mental ray. I wanted to see if indeed any renderer would have a hard time with this scene, but there is no problem with mental ray, at least regarding motion blur and DOF. Mental ray can't reproduce these selfilluminated spheres so there are no these strong reflections of them, which is why i didn't post the result.

EDIT: and those small selfilluminated spheres, even with 60000 passes they look... I don't know what they look like, but this is not what they should look like :D

[cecofuli]

Try with bucket.

[fobus]

Try with bucket.

https://forum.corona-renderer.com/index.php/topic,6220.msg42515.html#msg42515

[borisquezadaa]

I found something useful... if you choose an adequate custom bokeh shape the noise can greatly be reduced it seems the hard edges of default n-sided shapes are too much.
But the pixelated ligths remain. In the reality there would be some kind of corona around.
About 1000 samples (not 6000 so times cut by 6 with custom bokeh). XD. Lunch time... i'll be back.

[cecofuli]

Friends,  it 'a lost game. We have to wait for a new Corona version, with optimized adaptivity. That's all ;-)

[maru]

Is this scene available for download somewhere?

[borisquezadaa]

Post 1... its a great excercise. If you manage to render this... everything else is just a game.
I'm starting to give up. XD.

I know for shure changing anything from main settings only makes it worse.
Bucket mode cleans up a little better but not so much.
Progresive PT/PT not at all.

Fact 1: increasing image filter size to a ridiculous amount blurred the noise but blurries all. (Not good).
Fact 2: Raw power: Distributed render can't deal with animations. So no motion Blur.
Fact 3: External renderfarm: requires at least 2 euros for frame just to make it look usable.(If client pays... ).
Fact 4: Custom bokeh with soft edges improves a little an noise is less evident. (Just dims it).
Fact 5: Only Motion Blur-> no issues. FAST.
Fact 6: Only DOF -> noisy and difficult to clean.
Fact 7: Only motion blur pass with DOF Zdepth-> Photoshop... gross.
Fact 8: Same as 7 in after effects--- > better that photoshop... but gross at the end.

Fact 9: Out of ideas.... anyone?


I think that the myth that Corona can render this in reasonable time is ....


XD