kingsoz Posted October 27, 2005 Share Posted October 27, 2005 ellooooooooooo right, i know how to do this in max, so i know what i want i just don't know how to do this in houdini... basically i think i need an animated noise map thingy which gets projected through one of my lights to fakely simulate underwwater caustics. do i have to use VEX builder to create a surface or light shader?? if so what nodes do i use?? thanksss King Soz Quote Link to comment Share on other sites More sharing options...
Jason Posted October 27, 2005 Share Posted October 27, 2005 What do you need? Rays that project on the floor? Rays that just penetrate the a short way from the surface and twinkle? Volumetric shadows? Can you give us reference images? This slow-but-realistic way is to render maps out of COPs (thresholded turbulent noise is good for this) and use the maps in a VEX Lit Fog shader, but if you can cheat depending on your scene needs, do it. Quote Link to comment Share on other sites More sharing options...
kingsoz Posted October 27, 2005 Author Share Posted October 27, 2005 ello again, yea it would be nice to have rays coming from the surface of the ocean, and when they reach the floor it creates the caustic effect. it doesn't have to be accurately simulated, projection maps would be fine, he's 2 images which show the effects i want to create rays.bmp Quote Link to comment Share on other sites More sharing options...
lisux Posted October 27, 2005 Share Posted October 27, 2005 What about crating an animated texture with the caustic pattern, you cn do this using COPs for example, there is a tutorial for houdini 6 in the sidefx site about to do this. And then use this textures as projectors for a volumetric light. Quote Link to comment Share on other sites More sharing options...
eloop Posted October 30, 2005 Share Posted October 30, 2005 I've used this nice little tool in the past ... http://www.lysator.liu.se/~kand/caustics/ -Drew Quote Link to comment Share on other sites More sharing options...
kingsoz Posted October 31, 2005 Author Share Posted October 31, 2005 wow!!! thanks very much, this will come in handy!! Quote Link to comment Share on other sites More sharing options...
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