2 layers of specular?

olivierth · Apr 2013

Is it possible to have to layers of specular in one shader? I'm trying to create a hair shader and the key to it is having those 2 layers.

Thanks!

Obscura · Apr 2013

aaaa Yes?What/how do you want exactly?

olivierth · Apr 2013

I've done something similar in 3dsmax/vray. I used a VrayBlenMat to combine 2 specular on my low res hair mesh:

-One very narrow white specular
-One very large colored specular to make the hair color

All that with an anisotropic map. I did it with vray but it's not a very expensive shader. I'll try to post an image.

Obscura · Apr 2013

I guess the best solution would be a custom lighting material with 2 combined specular setup. Examples here:
http://udn.epicgames.com/Three/CustomLighting.html
I'm not sure that the aniso map is really needed for this.

olivierth · Apr 2013

This is more complicated than I expected and I'm not sure I understand if this is what I'm looking for.

Here's an example of what I meant.

Hair shader in vray

Obscura · Apr 2013

Yes, this is what are you looking for

what i am talking about, is the same, just use 2 different glossiness.

Obscura · Apr 2013

If you don't really know, how to do that things, I can make an example to show you if you want.

Edit - Here it is

olivierth · Apr 2013

Cool! Thank you very much for taking the time to make the example!

Will an anisotropic map affect the specular if it's done with the custom lighting?

Obscura · Apr 2013

I already searched about that, but its more comlicated:/
I found that so you can get idea how you would make it:
http://www.polycount.com/forum/showthread.php?t=102440

olivierth · Apr 2013

Ouch, I didn't know what I was getting into! I'll do some experimenting.

Thanks for all the quick help. I really appreciate it!

Obscura · Apr 2013

You are welcome, good luck!

2 layers of specular?

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