Chaos Corona Forum

Chaos Corona for 3ds Max => [Max] I need help! => Topic started by: matteosperi on 2023-02-17, 18:21:07

Title: caustics problem: (no exclude object)
Post by: matteosperi on 2023-02-17, 18:21:07

Hi,
i have a problem with this scene;
I have these bright white effects..
the water material is the preset in physical material;
in this case I can't exclude the walls from the caustics;
I don't use the bump fr the water but displacement : min 0 max 1 cm.
I also tried with bump without displacement but it's the same;

for the waves I used the noise map (I also tried other maps)..how can I do it? I don't know if I'm doing something wrong .. otherwise I remove the caustic effect
thanks for the support
Matteo

Title: Re: caustics problem: (no exclude object)
Post by: TomG on 2023-02-17, 19:34:05

Can you let us know why you can't remove the walls from the caustics calculations? This looks like an ideal situation for that very approach :)

Title: Re: caustics problem: (no exclude object)
Post by: matteosperi on 2023-02-18, 10:56:19

Hi, thanks for the support;
I would like that the effect on the ceiling could appear similar to the photograph; but maybe in my scene I can't have it ( maybe it depends on the inclination of the light etc...)
Matteo

Title: Re: caustics problem: (no exclude object)
Post by: Beanzvision on 2023-02-18, 11:18:53

I tend to use a mirror first to get the caustics where I want them. Then replace it with a water material. ;)

(https://forum.corona-renderer.com/index.php?action=dlattach;topic=39387.0;attach=179274;image)

Title: Re: caustics problem: (no exclude object)
Post by: matteosperi on 2023-02-18, 12:37:28

Hi ,
ok thanks, very interesting, I'll try a test

Title: Re: caustics problem: (no exclude object)
Post by: maru on 2023-02-20, 15:34:31

@Matteosperi - are you using region rendering in your first image? If so, please note that caustics currently do not work well with region rendering. Please render a full-frame image instead.
Also, you may be interested in the newest Corona 10 daily builds - https://forum.corona-renderer.com/index.php?topic=38385.0
There are some caustics improvement in them.
Just keep in mind that daily builds are experimental, so always save backups of your scenes before opening them in daily builds!