Faking Caustics

Just a little test.
EDIT: Using Blender Internal to fake caustics. Could probably be changed a bit to look more realistic.
http://farm3.static.flickr.com/2189/2212281896_7d387dd91c_o.png

Hey, not bad, how’d you do it?

Here is the blend. It uses 2 UV spheres and some strategically placed lights. This should work with 2.4/2.5. If not, you’ll have to grab an SVN build. The sphere could be changed (IOR) to look more realistic for sure and the light needs to be moved up a little bit.

a bubble! =) really cool !

try yafray
http://wiki.yafray.org/bin/view.pl/UserDoc/YafRayLighting
http://www.blender.org/development/release-logs/blender-234/yafray-plug-in/
http://en.wikipedia.org/wiki/Caustic_%28optics%29
see the bottom of this page for caustics
http://wiki.yafray.org/bin/view.pl/UserDoc/YafRayLighting?CGISESSID=f9ceccbf2c95e923e8cc4b27ee65ab85#Tuning_photons

Oh this was just a test to see how difficult it would be to achieve a caustic effect internally. It’s always fun playing with things like this.

Try texturing the lamp with a cloud texture for an even better effect. Not bad though.

oh right…sory i thought you where just trying to make caustics.

try a noise texture on the lamp as blenditail suggested but make the lamp only effect the sphere rather than the floor as well.:smiley:

Very nice trick… but somehow i doubt it wont work too well on more complex shaped glass objects.