Adaptivity intenity slider?

[cecofuli]

Hi Ondra,

I'm working on a file, with very, very strong DOF and bokeh effect.
After 10 minute, everything is perfect, but on the reflective metal part, the bokeh is SO noisy =(
Maybe, it's interesting to have a slider, a value to make the adaptivity stronger than now.
The default value is good for the 90% of project, I think. But there are situations, where we want more adaptivity.

what do you think?

[maru]

I don't think there is something as "stronger adaptivity". It is either on or off. You can however change adaptivity recalculation time in devel/debug settings. It is the number of passes after which adaptivity is recalculated. Setting it lower should make adaptivity more precise, but the rendering slightly slower.

You could also experiment with setting this value very high and see how it performs.

Any chance of sharing the scene? :)

[cecofuli]

In V-Ray, you can chose how much V-Ray can be "adaptive".
I'm talking about a scene with very strong DOF, big and bright bokeh,
I'm using GI vs AA = 2.
Adaptivity recalculation doesn't change nothing.

I cannot share the scene, but this is a test render at 640x640.

At this resolution, with this simple scene and with an i7 970, it's strange that I have so much noise in the bokeh...
Especially, because the rest of the image is good.
If I want a clean bokeh, we need to wait 6-7 hours.
My idea is to have more uniform noise, in case of strong DOF or Motion blur.
Maybe automatically, Corona can do this: strong noisy effects (glossy, dof, Mblur) more adaptivity.

[maru]

I have already reported something similar on mantis.
Can you try setting adaptivity recalc interval to some higher value? I can see that you are getting 3000+ passes, so I would suggest setting it to 50-100.

[cecofuli]

 Adaptivity recalc doesn't change a lot the result.
Yes, 3000+ beaucse strong DOF, soe GI vs AA = 4 or 2 ( I don't  remember exaclty)
With GI vs AA = 16 the situation is worse.

but, I know, this is an extreme situation.
for example, this user had a better result without adaptivity...

https://forum.corona-renderer.com/index.php/topic,11994.0/topicseen.html

[kumodot]

I had a "lot of problems" with this exacly behavior on a scene with strong DOF/bokeh... The image is clean in like 30-40 min but the Dof is noisy even after 3-4-5 hours... ;(

     This was the Job...

     I was using Corona 1.2 or 3, i can´t remember now... The "solution" was to render the ZDepth with the DOF ON, and then Crank up the Bockeh/Dof on Post... Add more Dof in Post, cleaned up the beauty noise...
   
     

[cecofuli]

In Corona 1.4 the situation is better that v1-2 or v1.3, because the new adaptivity.
But, the new adaptive sampling need more improvement, in my opinion.

[zuliban]

im also having the same trouble im not sure if this  a common raytracer problem a small source of light intense  bokeh in glass or metal surfaces 1.3 and 1.4 have the same spot of problems i was thinking 1.4 could resolve this but it did not if i render a crop of the small place it resolves in like 9k passes .

[cecofuli]

zuliban, did you already try GI  vs AA = 2? Maybe 4 is better, because you have a lot of GI.
But, I'm sure, Corona needs some improvement in this area (adaptive sampling, DOF and bokeh)

[zuliban]

i have tried 16, 64, 2 and 4 , i tried this scene in other renders and they fail in the same areas ,corona cleans them faster, so im sure this is a raytracer limitation or issue but at least it cleans with alot of time, i  just don't want to use post dof it looks fake.  but 1.3 cleans them better than 1.4 with bucket mode why not add bucket mode again with the new adaptivity?

[cecofuli]

I agree with you that Corona works better in this situation that other engine. And I think that yes, it's a very difficult problem to solve.
About bucket, I think that was only an experimental stuff
I think he doesn't  support the new adaptivity and some other new features. But I'm not 100% sure.
We must to ask to Ondra why.

Look at my old threads. I think you will find interesting =)

https://forum.corona-renderer.com/index.php/topic,1380.msg10247.html#msg10247

https://forum.corona-renderer.com/index.php/topic,1448.msg10795.html#msg10795

[cecofuli]

 I7 970, 17 minutes, at 640x640, with PTS=2,. too much noise =(
PS: there isn't any denoise.

[Juraj]

Bokeh on shiny specular against strong light was always trouble, even in Vray.

I kind of gave up on such situation and just go post-dof : /

[cecofuli]

Last time I worked with V-Ray was 3 years ago.
So, I don't know if there are some tricks for optimize this scene.
But, I wanted to try the same Progressive method, as in Corona.
Corona did a better job.
PS: in VRay, the metel for the lamp is too glossy. That's why I have less bokeh effect.
But, the goal was to see the noise in the santa.

[cecofuli]

But, I would like to have some "color threshold", like in the old Corona 1.3 bucket mode.
I prefer more uniform noise (with more noise of course), instead of perfect wall, but so bad noisy bokeh. =)