Just for fun

[khoross]

my bad got it working .thanks paul

[nmitchell]

Visible Caustics?

Hi Vlado,

Is there any way to view the caustic photons that aren't contacting surfaces, the same way you can view an irradiance map using imapviewer?

Thanks,
Nathan.

[vlado]

No, currently there is no way to do that. I have it noted though, so hopefully it will be implemented at some point.

Best regards,
Vlado

[nmitchell]

Visible caustics

Would there be any basic way to extract a txt file or something with the xyz of each photon.. or would that just be painfully huge?

Thanks again,
Nathan.

[vlado]

Well if you email me to vlado@chaosgroup.com I can get you the format of the .vrpmap files.

Best regards,
Vlado

[Subburb]

Hi !
Here's my little contribute to this thread...
Only direct caustics here using the "renderers.current.caustics_showCalcPhase=true " method.
don't render final image is ON. Only Photon pass.
- 1 light - 12000 photons fired
- 15min rendertime on Q6600@3.2 Ghz - Vray 1.5 SP3)
- render at 1600*2133 then half downsampled in photoshop to remove some grain.

The atomic caustics mushroom :


I've some little questions though :
- Wich caustics parameters are involved (or not) with this method ?
- Why the CPU is almost 70% while computing ? does i have to force system_numthreads to 4 yo get a full 100% computing ?

Awesome tip anymay, i'll continue to play with !

trying actually to make godrays with volumetric clouds... no chance for instance.. is it possible to combine 2 different environementfog in sp3 ? (i'll made a new thread for that if you think it's necessary

[jophus14]

That looks really cool. Reminds me of something you'd see done in AE.

[simmsimaging]

Cool effect Jérôme
b

[tammo]

that is awesome.
So beautiful, look slike a painting.
what kind of geometry is producing it?

[Subburb]

thanks !

nothing complex here.. just started with the "volumetric caustics scene" found on www.spot3d.com Vraydoc site (see examples : EnvironementFog page).

Just replaced the VraySphere with a standard sphere sliced by some boxes (proboolean) and playing with nurms subdivs... you can try with any object ! torus, knot, teapot, ... the main parameter for color is the material refract fog color. The camera is a close look to the caustics on the vrayplane. all the rest is random... and a little bit of photoshop (levels/lum-contrast)
That's the magic part : Vray did 99.9% of this pic ! and each try gives unique results... coooool !

[rmejia]

That "atomic caustics mushroom" looks awesome

[stevesideas]

I dont understand...i have caustics turned on and im using irrmap/lightcahce. Ive also the show calc of caustics by using "renderers.current.caustics_showCalcPhase=true ", but im not seeing anything...

[werticus]

i've not yet been able to see any form of caustic, it defeats me every time

[cecofuli]

Hi,

try to see my old videotutorial

Hope can help you

bye bye

[stevesideas]

Thanks very much...this looks very helpful.