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View Full Version : SSS, Final Gather, and Specular Issue

piajartist
03-03-2010, 07:21 AM
So Ive been doing tests with a bust with maya fast SSS skin in a HDRI lit scene with final gathering. I have two spheres pushing high irridicence for lighting reasons (no lights, mental ray, maya 2009)

Here's my problem:
I can't seem to get the specular attributes to work with my SSS shader or when i connect a transparent blinn to my JSmultilayers shader. No matter how high or low the settings are on, say the Eccentricity, or specular color the brightness of the skin is the EXACT SAME. The only time i can get some kind of visible change is when i turn on reflectivity in either SSS specularity options or blinns specular options. So unless i connect my Specular map to the reflectivity slot i cant even see my specular map detail.

And im not liking the reflection results since im getting a glossy/glass look in the wrong kind of way.



Im not sure if this has something to do with the fact that im using FG indirect illum only....scratching head..

thoughts?
piajartist
03-03-2010, 08:07 AM
well i threw some soft lights in and that has fixed my issue...
liuyaming
03-04-2010, 08:28 AM
don't use reflectivity in SSS specularity..that's not good...

1:only render SSS...
2:Use Blinn render speclar and reflection...maybe need some reflection and bump textures..
3:compose in NUKE or PS

that's good way...I think...
Marien
03-07-2010, 10:22 PM
1:only render SSS...
2:Use Blinn render speclar and reflection...maybe need some reflection and bump textures..
3:compose in NUKE or PS


There's also the mib_glossy_reflection node which allows to "composite" reflections (glossy if you want them to be) on top of whatever material. Just drop the base material in the corresponding slot and assign the node like a shader.
Redsand1080
03-09-2010, 01:33 AM
Even better is miss_fast_skin plugged into additional slot of mia_material_x. Best glossy reflections possible with mental ray. And actually using some of the miss_fast_skin spec in addition to mia_material_x glossy reflections is quite beautiful when done right.
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