KeyShot 4.1 Beta - Caustics tests

Started by DriesV, May 22, 2013, 12:02:30 PM

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DriesV

Quote from: The Metal Master on May 23, 2013, 05:08:00 AM
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Now we need the ability to do volume caustics - they are gorgeous but very elusive  ;)
...

+1
I definitely categorize participating media as a 'nice to have' feature. ;)
However, volume caustics can be quite costly as they can take a very long time to become free of noise.

Dries

KeyShot

If there is a need for it then we might be able to do it using some of the newer simulation techniques:
http://graphics.ucsd.edu/~henrik/papers/volumetric_radiance_using_photon_points_and_beams.pdf

KeyShot

Forgot to add: amazing test scenes Dries. Thanks for your help in making us push this to the next level.

DriesV

HELP!!
I'm developing a fetish for optical simulations in KeyShot 4.1... :P

Btw,
Henrik, I'm really loving the close interaction with the KeyShot development team! It's fulfilling to see that user feedback is actually being listened to and used to make the program better when possible. **hat off**

Dries

Esben Oxholm

Wow. That is cool! Can't wait to try it out myself.

DriesV

#20
From white stripe, to wide dispersed pattern, back to a white point. ;)
I needed a really fat lens to refocus the extremely dispersed light...

Dries

DriesV

Quote from: Esben Oxholm on May 24, 2013, 02:16:07 AM
Wow. That is cool! Can't wait to try it out myself.

Esben, your 3D glasses are going to look awesome with these caustics. ;)

Dries

DriesV

I put another lens in my optical stack. :D
This one is aspheric (stretched along z axis).
Note that at the end the dispersion gets inverted.
In the low exposure shot you can clearly see that the 'focus point' is indeed very bright. ;)

Dries

DriesV

I just realized I hadn't used any mirrors yet... :)

Dries

DriesV

Here's a little more cooked version.
Also a low exposure shot to show the brightest areas clearly.

Dries

em3d

so excited for this, it just keeps getting better and better.  wooooooo!

DriesV

#26
Getting funky with caustics... ;D
This time I used a parabolic reflector (y=0.5*x^2 (interval for x:-5 to 5); revolved surface) with a point light in the focus point. This creates a highly focussed light beam, which is very efficient to use for caustics (no light is spilled).
I'll be posting some variations of this scene tonight.

Dries

DriesV

#27
Same setup, but with an additional polished metal ring placed inside the caustic pattern.

Dries

Esben Oxholm

Wow. The one in the middle is beautiful. I could hang it on my wall!

DriesV

An elaboration of an earlier shot.

Dries