2 layers of specular?

olivierth

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

aaaa Yes?What/how do you want exactly?

olivierth

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

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

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

Yes, this is what are you looking for what i am talking about, is the same, just use 2 different glossiness.

Obscura

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

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

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

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

You are welcome, good luck!