Chaos Corona Forum

General Category => Gallery => Work in Progress/Tests => Topic started by: sawaxe on 2014-05-06, 21:42:26

Title: Fake caustics
Post by: sawaxe on 2014-05-06, 21:42:26

My attempts to find a caustics. I used an original method, which offered vertigo1 here:
https://forum.corona-renderer.com/index.php/topic,3598.0.html (https://forum.corona-renderer.com/index.php/topic,3598.0.html)

Title: Re: Fake caustics
Post by: maru on 2014-05-06, 21:48:14

Can you explain what you were trying to achieve? What I can see is:

1. glass objects not casting caustics
2. glass objects not casting caustics with faked caustics looking like refracted/reflected from water

To enable caustics for glass objects just turn on "caustics" checkbox in material's properties.

Title: Re: Fake caustics
Post by: sawaxe on 2014-05-06, 22:13:52

Quote from: maru on 2014-05-06, 21:48:14

To enable caustics for glass objects just turn on "caustics" checkbox in material's properties.

I'm trying to achieve photorealistic caustic reflections on all surfaces, where they should be
Caustic glasses of course already exists, but for some reason it does not appear on other surfaces.
Please forgive me for my bad English. Description in Russian can be seen here:
http://sawaxe.blogspot.ru/

Title: Re: Fake caustics
Post by: ondrike on 2014-05-07, 12:50:07

sorry man, but your caustic faking looks absolutely horrible...what you achieved is floor with water caustic, which looks incredible funny :D 

Title: Re: Fake caustics
Post by: Chakib on 2014-05-07, 13:32:12

Quote from: ondrike on 2014-05-07, 12:50:07

sorry man, but your caustic faking looks absolutely horrible...what you achieved is floor with water caustic, which looks incredible funny :D

+1, why using a water caustic fake projection map here ?! I can't believe this...

Title: Re: Fake caustics
Post by: sawaxe on 2014-05-07, 14:19:22

Quote from: ondrike on 2014-05-07, 12:50:07

sorry man, but your caustic faking looks absolutely horrible...what you achieved is floor with water caustic, which looks incredible funny :D

I agree with you that fake caustic looks unrealistic
That's why I posted my attempts to find the caustic.
I hope somebody tell me the correct decision.

Title: Re: Fake caustics
Post by: ondrike on 2014-05-07, 14:25:01

correct way how to create caustic is really simple.. just check in your material caustic checkbox B-) and set render solver to Prograsive PT+PT or BiDir/VCM... that´s it

Title: Re: Fake caustics
Post by: sawaxe on 2014-05-07, 14:48:31

Thanks
All materials glass with caustics
I will use Prograsive PT+PT or BiDir/VCM now

Title: Re: Fake caustics
Post by: maru on 2014-05-07, 15:12:41

By the way, if you want FAKE caustics, then don't check the "caustics" checkbox in material's properties - you will get transparent shadows then.

Title: Re: Fake caustics
Post by: maru on 2014-05-07, 16:44:31

I made a small comparison of basic ways of producing caustics in Corona:
https://forum.corona-renderer.com/index.php/topic,3708.0.html
Hope it will be useful.

Title: Re: Fake caustics
Post by: sawaxe on 2014-05-07, 20:28:30

Thanks maru
It really is very useful information
I'll try to do in this direction caustics