Chaos Corona Forum

Chaos Corona for 3ds Max => [Max] I need help! => Topic started by: ale.castano on 2019-06-11, 12:40:01

Title: Problems with caustics
Post by: ale.castano on 2019-06-11, 12:40:01

Hi all,
I was playing around with Corona 4 to try caustics. Despite all the tests I've made I can't get the result.
Caustics don't show up. I've set up a simple scene:
- plane and backdrop
- solid glass sphere + prism
- direct light (tried sun / light / Ies)
- checked "ENABLED" caustic solvers under Settings > Performance
- Material is the Corona Library glass, checked the "CAUSTICS (slow)" button
- Checked "Generate Caustics" in every light i tried.
- tried to increase Max Sample Intensity over 100 (Performance > Speed vs Accuracy balance)

In the attached image caustics should be show up.
What am I missing or doing wrong?

Title: Re: Problems with caustics
Post by: pokoy on 2019-06-11, 13:30:23

It should be as easy as enabling caustics in the render settings (and setting materials to 'caustic' for refractive materials) - you've done everything there is to do... I just tried and it just works...
Did you try different lighting conditions? Sometimes, caustics only give a faint effect depending on the light's angle.

BTW, you don't need to touch the MSI parameter, caustics are designed to work with the default value.

Title: Re: Problems with caustics
Post by: romullus on 2019-06-11, 13:57:41

Hi,
Probably the best way to find a problem, is to attach the scene. Someone could pick it up and spot if there's wrong setup or anything else.

Title: Re: Problems with caustics
Post by: ale.castano on 2019-06-11, 14:04:08

Thanks Pokoy,
Yes, I tried different types of light (Sun, plane, IES),  put them in different poistions and change value.
Just wanted to be sure i didn't di anything wrong.
I'll keep playing with values and positions.

Title: Re: Problems with caustics
Post by: ale.castano on 2019-06-11, 14:04:56

Hi romullus, thanks.
I'LL attach It as soon as i get back to my desk!
Thank you all!

Title: Re: Problems with caustics
Post by: rabbsan on 2019-06-11, 15:22:51

If you want the caustics to show up in the Beauty pass you can uncheck "Only in caustics element" box.

(https://i.imgur.com/AuS93r1.jpg)

And also make sure light source is strong enough to give caustic effect.

(https://i.imgur.com/VyBgsEL.jpg)

/ Joel

Title: Re: Problems with caustics
Post by: ale.castano on 2019-06-11, 18:55:59

Rabbsan, unchecking ONLY AUSTICS IN ELEMENT did the trick, thank you!
Thank you all for the support, always a great community here.