Hi

I'm trying to create a shader for a gem stone. I'm basically teaching myself VOP shader writing as I go along, and I can't seem to find any tutorials available.

Basically I'm stuck trying to create the refraction effects using VOPs. I'm unclear about which VOPs to use and how they should be connected in my pipeline to the Output VOP. If someone could please explain how to typically use these vops to scatter light through a surface, I would be very grateful. Or if you prefer, you can download my working file (Apprentice Version) from this address and examine:

http://www.illusionmedia.net/testGem.hipnc [illusionmedia.net]

Thanks very much in advance!

Watch these tutorials if you haven't already:

http://sidefx.vislab.usyd.edu.au/houdini_video/by_topic/rendering/index.html [sidefx.vislab.usyd.edu.au]

I don't know if any speak directly to Refraction, but they give some of the basic gist of wiring up the VOPs.

-Craig