Author Topic: 3d glasses - jaggy caustiscs  (Read 3308 times)

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Offline Esben Oxholm

3d glasses - jaggy caustiscs
« on: March 31, 2013, 04:37:23 am »
Hi.

I've been experimenting a bit with a pair of 3dglasses. I've have a sphere in the scene with the "area light diffuse" material wich provide almost all the light in the scene. The environment is set to 0.15 in brightness.



I'm satisfied with the overall result, but the blue and red caustic from the glass that hits the ground is quite jaggy. I've tried to adjust different settings, but cant figure out how to improve the caustic.

Any good ideas?
Best regards

Offline TpwUK

Re: 3d glasses - jaggy caustiscs
« Reply #1 on: March 31, 2013, 11:19:17 am »
Just a guess but maybe the DOF interferes with the the caustics or the scene needs ray bounces set to a higher number ...

Martin

Offline KeyShot

Re: 3d glasses - jaggy caustiscs
« Reply #2 on: March 31, 2013, 12:10:20 pm »
Try to increase the shadow quality.

Offline Esben Oxholm

Re: 3d glasses - jaggy caustiscs
« Reply #3 on: April 02, 2013, 06:38:01 am »
Removing DOF and increasing shadow quality doesn't help.
I have furthermore tried to pump up every render setting parameter one by one without luck.

I have also tried to increase samples directly in the transparent material and in the diffuse light materials with no results...

Nothing seems to affect it. Not noticable at least.

Any ideas?

I have uploaded a package with the scene if anyone should feel like solving the problem :)
http://dl.dropbox.com/u/2388699/3dglass.ksp

Cheers.

Online DriesV

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Re: 3d glasses - jaggy caustiscs
« Reply #4 on: April 02, 2013, 06:59:26 am »
Aha, you got caustics (experimental) enabled for the area light.
In my experience the current caustic implementation needs super many samples (general sampling level) or much time to get smooth results.
I believe Henrik can confirm this will be greatly improved in future KS releases...

For this particular scene you might be better off with disabling caustics and switching the material of your glasses to 'Glass' (the simpe one, not solid glass...).
This will give you a semi-caustic effect that gives very smooth results very fast.

See attached ksp file.

Dries
« Last Edit: April 02, 2013, 07:02:41 am by DriesV »

Offline Esben Oxholm

Re: 3d glasses - jaggy caustiscs
« Reply #5 on: April 02, 2013, 09:07:52 am »
Nice DriesV. Thank you very much (y)