Chaos Corona Forum

Chaos Corona for 3ds Max => [Max] I need help! => Topic started by: Nekrobul on 2015-12-02, 10:00:38

Title: Custom bokeh
Post by: Nekrobul on 2015-12-02, 10:00:38
How should the mask file look like for the bokeh?

Should it be BW mask where white is bokeh itself?
Title: Re: Custom bokeh
Post by: maru on 2015-12-02, 13:16:23
White shape on black background.
You can use color map to fake some crazy effects like chromatic aberrations.
Title: Re: Custom bokeh
Post by: Nekrobul on 2015-12-02, 13:39:07
Thank you.

Always wanted to achive those fancy mirror lens bokeh on renders

(https://upload.wikimedia.org/wikipedia/commons/4/40/Bahnhof_Dortmund_Brackel_Spiegeltele_DSC02359_smial_wp.jpg)
Title: Re: Custom bokeh
Post by: maru on 2015-12-02, 13:59:53
Yeah, it should be fairly simple with a doughnut-shaped map.
Title: Re: Custom bokeh
Post by: romullus on 2015-12-02, 14:20:24
I noticed that most photographers find bokeh from mirror lens to be ugly, while most CG guys think it's very attractive :]
Title: Re: Custom bokeh
Post by: Freakaz on 2015-12-02, 14:27:23
It would be awesome to mimic a twisted bokeh, the one that old russian Helios lens used to produce.
Title: Re: Custom bokeh
Post by: Nekrobul on 2015-12-02, 14:30:06
It would be awesome to mimic a twisted bokeh, the one that old russian Helios lens used to produce.

I think it could be replicated, just need to understand the physics behind the proces.

(http://rusoptics.com/media/2010/1601/optical-scheme-helios-44.jpg)
Title: Re: Custom bokeh
Post by: romullus on 2015-12-02, 14:40:47
It would be awesome to mimic a twisted bokeh, the one that old russian Helios lens used to produce.

It is requested, so hopefully one day we will get this: https://forum.corona-renderer.com/index.php/topic,4980.0.html
Title: Re: Custom bokeh
Post by: dubcat on 2015-12-02, 15:02:24
Bertrand (http://bertrand-benoit.com/blog/wonky-bokeh/) shared some bokeh maps last year. His site was kinda slow today.