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}-{obbes
06-04-2007, 01:44 PM
Hey all, i'm looking to make a shader with dichroic effects to it. Now, based on the properties of the effect, i think I can do this with conditions based on the position of the camera hooking into the spec color in correlation to where the light source is, however heres the problem, I dont know jack about setting up shader networks that involve anything more than the original node.
So, can one of you geniuses out there help me out?


If you dont know what dichroic means, check out this link with emphasis of the effect on the bottom paragraph: http://etsyglass.com/blog/index.php/2007/02/22/what-is-dichroic-glass/

floze
06-04-2007, 03:23 PM
What you are after is a goniochromatic, or iridescent shading effect. Dichroism however can be simply achieved by using different colors for reflection and transparency.

Binary alchemy has an iridescent shader, it's called oily_specular:

http://www.binaryalchemy.de

republicavfx
06-04-2007, 05:00 PM
based on those images i bet u could get somewhere with the car paint shader in MR

}-{obbes
06-05-2007, 02:32 AM
What you are after is a goniochromatic, or iridescent shading effect. Dichroism however can be simply achieved by using different colors for reflection and transparency.

Binary alchemy has an iridescent shader, it's called oily_specular:

http://www.binaryalchemy.de


Thanks alot for the clarification, i didnt know the name of the effect and when I googled around a bit I found dichroism and the description on that site i linked pretty much said what I wanted.

I checked out binaryalchemy and downloaded the shader, but my oh my its got ALOT of attributes and such I dont even know what does what, nor what to plug into what. I looked further around the site and its forums but I found nothing in terms of a readme guide telling what attributes do, or any kind of tutorials on how to achieve the effects shown in the sample images. I dont even know exactly where you plug it in, or if you plug pieces in etc etc. I played around earlier plugging it into spec color alone, and tweaked values and such, but I gave up after a bit, i'll try again later.

In the meantime, do you happen to know if theres any kind of tutorials for the shaders that like used to be linked but were removed or something? I'd love to know how to use this shader to its best (goal is to get something like the dragonfly wing, only not transparent).

Thanks again.

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06-05-2007, 02:32 AM
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