Render challenge - water caustics

Render challenge - water caustics

Postby solo » Thu Jun 18, 2009 7:16 pm

I was on the Thea forums and came across a thread showcasing a feature of the upcoming app, water caustics. This is a long awaited feature that I am anxious to try out, maybe even re-render some previous models that will benefit from this cool new feature.
Here is an image of Thea unbiased render with caustics:


As you can see it's an awesome effect that makes an ordinary pool into a spectacular one.

....so!! using your choice of rendering solution, I challenge you to 'fake' it, or not if your render solution can actually pull it off, I'd be interested to see if there is a straight up solution, the new Indigo is rumoured to have this too by the by.

Have fun.
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Re: Render challenge - water caustics

Postby rombout » Thu Jun 18, 2009 8:51 pm

wow that really looks great. Your already a owner of the new thea render engine??? :knockout:
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Re: Render challenge - water caustics

Postby solo » Thu Jun 18, 2009 9:26 pm

Hell no, I am hoping to get my grubby hands on the beta next month however.

The above was Modeled/rendered by Patrick Nieborg, he is the lucky one to have the opertunity to be playing with the alpha.
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Re: Render challenge - water caustics

Postby Gaieus » Thu Jun 18, 2009 9:34 pm

Well, Patrick has done enough for Kerky so that he is a steady member of the dev/alpha/beta/minus gamma whatever team over the Aegean (or rather Adriatic) part of the world.
;)
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Re: Render challenge - water caustics

Postby Brodie » Thu Jun 18, 2009 10:45 pm

I'm interested in testing this out myself but in the meantime, here's a Maxwell render (not done by me)
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Re: Render challenge - water caustics

Postby majid » Fri Jun 19, 2009 8:50 am

interesting.... I've done some renders using KT ( it's start was the topic that is called as "KT under water" ) and then i've tried a detail , using Indigo.... both have real caustics... and also i've mimiced it using v-ray... but at the moment I'm going to re-render an old scene using KT... and soon will upload ;)
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Re: Render challenge - water caustics

Postby solo » Fri Jun 19, 2009 8:29 pm

Vue is the only app I know of with real caustics, besides Thea and the new version of Indigo (which are still to be released I believe)

Here is a simple SU setup that one can use to test caustics:



Simply a water plane, with a ground plane for the refractive caustics to show on and a light source.

Here is the Vue caustic:

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Re: Render challenge - water caustics

Postby remus » Fri Jun 19, 2009 10:04 pm

Heres my go in indigo. Taking a while to clear up though, so i'll post a (hopefully) cleaner version in the morning.
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Re: Render challenge - water caustics

Postby pilou » Fri Jun 19, 2009 11:25 pm

Out of challenge : Zbrush for the fun :)
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Re: Render challenge - water caustics

Postby majid » Sat Jun 20, 2009 4:33 am

this is my try, fake caustics , out of KT
water-pool-copy.jpg

real coustics , pure KT (modeling and rendering, both) ,redused noise
kt-preset-20-9-pass.jpg
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Re: Render challenge - water caustics

Postby remus » Sat Jun 20, 2009 8:45 am

heres it again after 11 hours.
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Re: Render challenge - water caustics

Postby samprocess » Sat Jun 20, 2009 1:36 pm

very cool thread, i'm also want to try some.
:fro:
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Re: Render challenge - water caustics

Postby modelhead » Sat Jun 20, 2009 2:38 pm

Cool Remus...what does your water mesh look like? Big chunk of thin glass?
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Re: Render challenge - water caustics

Postby remus » Sat Jun 20, 2009 3:35 pm

Yeah, just a big volume:
water.png


Made using jim's randomise TIN script followed by 2 SDSs.
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Re: Render challenge - water caustics

Postby 21D » Sat Jun 20, 2009 7:23 pm

this is my try....it's a simple box, with a flat rect. geo.
sent to modo401....textured and rendered
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Re: Render challenge - water caustics

Postby solo » Sat Jun 20, 2009 8:03 pm

Excellent Modo 401 show piece, so how is the new Modo so far?


Here is a faked caustic I did in December 2006, using Podium version 1.0.

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Re: Render challenge - water caustics

Postby sepo » Sat Jun 20, 2009 8:16 pm

This brings some memories :)
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Re: Render challenge - water caustics

Postby 21D » Sat Jun 20, 2009 8:32 pm

solo wrote:Excellent Modo 401 show piece, so how is the new Modo so far?

Well haven't played to much with it, only been test running it.....the "fur" ellement is just amazing...i'll see if i can post a sample of it used to creat a grass field.
as you could see the caustics also looks good, even though i have a dual core machine, it renders pretty fast (see the caustics render screengrab), i am now going to try out the blurry refractions...
but all in all, amazing.
it's a bit more aimed now for archvis with all the presets that can be used,
i am definitly going to learn how to use it, so i can add it to my archvis workflow.
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Re: Render challenge - water caustics

Postby majid » Sun Jun 21, 2009 3:54 pm

solo wrote:....

Here is a faked caustic I did in December 2006, using Podium version 1.0.


congrats Solo... it is an art work, out of podium!!! :thumb:
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Re: Render challenge - water caustics

Postby dale » Sun Jun 21, 2009 4:42 pm

Well not totally satisfied yet, but though I'd post the progression.
Kerkythea
Water Surface is thin glass, IOR 1.33, color changed to blueish, Perlin Noise Fresnel added

Rendered with Preset 09 Photon Caustics Medium
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Re: Render challenge - water caustics

Postby majid » Mon Jun 22, 2009 12:14 am

dale wrote:Well not totally satisfied yet, but though I'd post the progression.
Kerkythea
Water Surface is thin glass, IOR 1.33, color changed to blueish, Perlin Noise Fresnel added

Rendered with Preset 09 Photon Caustics Medium

if you are going to have a better result , maybe give a try over dielectric glass shader ... or maybe download waterpack I've prepared some while ago :
http://www.kerkythea.net/joomla/index.p ... info&id=86
also less bump over Z direction is needed...and the best result for true caustics would be reached , using preset no 20...
also u may have your camera , just below water surface ;) ( give it a try :thumb: )
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Re: Render challenge - water caustics

Postby Richard » Mon Jun 22, 2009 3:03 am

Hey those modo images are amazing!

Maxwell - faked!




Maxwell night - faked! 5 min test render! Needed longer!

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Re: Render challenge - water caustics

Postby sepo » Mon Jun 22, 2009 12:40 pm

Richard , that wood panel texture is great. Could you tell what it is? Arroway? Love that pool render. Nice, clean design.
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Last edited by sepo on Tue Jun 23, 2009 1:01 am, edited 1 time in total.

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Re: Render challenge - water caustics

Postby majid » Mon Jun 22, 2009 1:53 pm

here are other renderes from differenr scene.. it seems that KT has good caustics handling , but the water material , doesn't let that the caustics be seen from top view ...
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Re: Render challenge - water caustics

Postby Fred » Mon Jun 22, 2009 2:11 pm

I tried something to.

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Re: Render challenge - water caustics

Postby dale » Mon Jun 22, 2009 2:50 pm

majid wrote:if you are going to have a better result , maybe give a try over dielectric glass shader ... or maybe download waterpack I've prepared some while ago :
http://www.kerkythea.net/joomla/index.p ... info&id=86
also less bump over Z direction is needed...and the best result for true caustics would be reached , using preset no 20...
also u may have your camera , just below water surface ;) ( give it a try :thumb: )


Thanks majid
I hope to get time to try this. I do have, and use your waterpack quite often, (thanks for that), but when I try these challenges I like to try to do them from scratch to try and understand some of the principles, and controls and their variables. It also makes me go through some of the tips, tricks, and tutorials on the Kerkythea forum site, from which I always learn.
Thanks for the help.
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Re: Render challenge - water caustics

Postby olishea » Mon Jun 22, 2009 7:30 pm

solo....how did u fake the podium caustics?
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Re: Render challenge - water caustics

Postby solo » Mon Jun 22, 2009 7:33 pm

Oliver, it's done with a light and a caustic pattern overlaid onto a texture in PS, actually very simple. Now with blurred reflections and bump mapping it can be done even better.
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Re: Render challenge - water caustics

Postby olishea » Mon Jun 22, 2009 8:14 pm

thanks for the reply pete
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Re: Render challenge - water caustics

Postby dale » Mon Jun 22, 2009 9:15 pm

another attempt
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