On SSS, Specular and Satin

wancow

I haven't gone through the amazing stuff on the OTHER SSS thread I started (I'll get to it, I promis!, you guys are.... well, amazing)

Anyway, a friend (who is a crackerjack clothing modeller) asked me about SSS and Satin shaders.

I have these:
http://www.sharecg.com/v/21706/related/7/Material-and-Shader/DazStudio-Satin-Shader-Resource-2

They were designed for DS 3 which I presume is 3Delight...

Anyway, I told my friend, the crackerjack clothing maker, that I thought (methinks) that using double specular would be the key to getting a good satin shader and I believe the only way you can get that is using ubersurface...

Anyway, I'm just messing around with that a bit, because I'll probably need a good satin shader for Belle's dress ANYWAY...

I"m playing around with tiled noisemaps in the specular channels...

Khory

I don't think that SSS would play a key roll in satins. A teeny bit seems logical since pretty much everything has some light bending below the surface. And higher levels of SSS would start to give the surface a more plastic feel rather than fabric like.

My satins usually use both specularities. The first for the overall fabric sheen inherent in the fabric (that has a map that matches the bump as the specularity strength) and the second for the glancing light sheen. Fresnel for the glancing light is also valuable in satin shaders.

wancow

forgot about fresnel! Hmmm... would you mind terribly sharing your settings?

Khory

I can share but its not wildly helpful since I used maps in so many slots in my product. Spec on has a map in both color and strength (fairly light gray tone) gloss 10% and it is set at 100 strength. Spec 2 is 10% with roughness and sharpness around 31% (sort of depends on the colors). Spec 1 is a slightly lighter version of the diffuse color or a color that will complement the base color (for example the one I just looked at had a slightly yellower cast than the gold diffuse) and spec 2 is just a teeny bit lighter than spec 1. It all will vary depending on the color your shooting for though. Fresnel is 15%. No SSS or translucence even though most fabrics do have minimal translucence.

wancow

I'll play with those, thanks Khory. I tend to like to use noise maps when I'm playing with settings... I have one I base almost every test I do on... I might just post it for SnGs...