Author Topic: KeyShot 4.1 Beta - Caustics tests  (Read 29924 times)

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Offline DriesV

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Re: KeyShot 4.1 Beta - Caustics tests
« Reply #15 on: May 23, 2013, 03:46:56 pm »
...
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

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Re: KeyShot 4.1 Beta - Caustics tests
« Reply #16 on: May 23, 2013, 09:52:07 pm »
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

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Re: KeyShot 4.1 Beta - Caustics tests
« Reply #17 on: May 23, 2013, 09:56:21 pm »
Forgot to add: amazing test scenes Dries. Thanks for your help in making us push this to the next level.

Offline DriesV

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Re: KeyShot 4.1 Beta - Caustics tests
« Reply #18 on: May 24, 2013, 01:53:11 am »
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

Offline Esben Oxholm

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Re: KeyShot 4.1 Beta - Caustics tests
« Reply #19 on: May 24, 2013, 02:16:07 am »
Wow. That is cool! Can't wait to try it out myself.

Offline DriesV

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Re: KeyShot 4.1 Beta - Caustics tests
« Reply #20 on: May 24, 2013, 03:53:50 am »
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
« Last Edit: May 24, 2013, 04:18:44 am by DriesV »

Offline DriesV

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Re: KeyShot 4.1 Beta - Caustics tests
« Reply #21 on: May 24, 2013, 04:12:15 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

Offline DriesV

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Re: KeyShot 4.1 Beta - Caustics tests
« Reply #22 on: May 24, 2013, 06:32:55 am »
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

Offline DriesV

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Re: KeyShot 4.1 Beta - Caustics tests
« Reply #23 on: May 24, 2013, 10:18:54 am »
I just realized I hadn't used any mirrors yet... :)

Dries

Offline DriesV

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Re: KeyShot 4.1 Beta - Caustics tests
« Reply #24 on: May 24, 2013, 01:10:33 pm »
Here's a little more cooked version.
Also a low exposure shot to show the brightest areas clearly.

Dries

Offline em3d

Re: KeyShot 4.1 Beta - Caustics tests
« Reply #25 on: May 25, 2013, 06:46:19 pm »
so excited for this, it just keeps getting better and better.  wooooooo!

Offline DriesV

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Re: KeyShot 4.1 Beta - Caustics tests
« Reply #26 on: May 26, 2013, 09:00:43 am »
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
« Last Edit: May 26, 2013, 11:37:01 am by DriesV »

Offline DriesV

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Re: KeyShot 4.1 Beta - Caustics tests
« Reply #27 on: May 26, 2013, 09:38:13 am »
Same setup, but with an additional polished metal ring placed inside the caustic pattern.

Dries
« Last Edit: May 26, 2013, 01:22:58 pm by DriesV »

Offline Esben Oxholm

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Re: KeyShot 4.1 Beta - Caustics tests
« Reply #28 on: May 26, 2013, 11:59:25 am »
Wow. The one in the middle is beautiful. I could hang it on my wall!

Offline DriesV

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Re: KeyShot 4.1 Beta - Caustics tests
« Reply #29 on: May 27, 2013, 02:51:11 pm »
An elaboration of an earlier shot.

Dries