Some adjusts. Thank you rollmops. The bump is ok now.

I’ve got a question, to improve the shading on the ear, should I map the weight of the front SSS In my misss node?

Hmm…looks to me like your diffuse is what’s visible on your ear there.
Try changing the color on your diffuse.
The first one’s better. In either case, if there was backlight strong enough to make his ear glow, it should illuminate his hair much more than his ear. His ear should be redder too.
To anyone with BUMP PROBLEMS
Yes, you must connect via a bump2d or bump3d node.
As noted earlier, you can get filtering problems. I incorrectly stated this could be fixed by turning down the filter. It can - but that just cures the symptom, not the problem.
The REAL FIX for the bump problem is to check the little box “Export with Shading Engine” in the mental ray section of the Shading Group! The bump2d node requires a Shading Engine somewhere in the chain of parents to work!
Hope this helps!
/Z
yesterday i read the lamrug tutorials and wanted to save the tutorials and scene files, but now i cant access their website, is it down? Does anyone have the SSS tutorials and scene files anywhere for download. Or any info on when the site will be up? thanks.
Try google cache. Search for the specific site on google and click on the ‘Cache’ link. For the physical sss this would be http://www.google.de/search?q=cache:iY3ovHx3tHcJ:www.lamrug.org/resources/physsstips.html+lamrug+physical+subsurface&hl=de. But without pics and the files of course… hope they will be back online soon. :sad:
Now you know it! And [dark breath] …use this power… wisely… [/dark breath].

There is also another way, the wayback machine of http://www.archive.org/. Unfortunately the latest entry of lamrug.org is from february2004, so no misss…
Today I had a problem with the shader MISSS.
I gave break connection in the node Light Map Shader (for some reason that I don’t remember which) and I created a new light map, connecting another misss_fast_lmap_maya, in other words, now I had a node MentalrayTexture1 that was not using, and a MentalrayTexture2, that I was using.
When I went render the scene, render was aborted - / / Info (Mayatomr): Aborted / /, and an error message appeared in the script editor:
// Warning: (Mayatomr.Shader) : mentalrayTexture2: no texture file referenced //
And the render only worked again when I reconnected mentalrayTexture1.
did I make something wrong, or is a bug of the shader?
MentalrayTexture1 should be in both your SSS attributes and your Lightmap Attributes or the shader will not function correctly. So just delete MentalrayTexture2.
See Rollmops thread for the picture of the shader network.
DD
I have download the diffuse zip and the diffuse-formaya . I have put the Diffuse.mi in the mentalray/include file. The Diffusion.dll in the mentalray/lib file. I wrote the 2 lines in the maya.RAYRC file. Now. where the scripts, xpm and fti files ? and alll the other files with CPP, DSP, SPDL, PRESET, DSW and H. where they go ? Can anyone telll me how to doit please.
thanks
i did some test with the misss please guy tell me what do you think about the skin aspect, to much scattering or not?
For the info i plug a occlusion shader in the ambient slot of the misss shader i use a very poor lighting (i point light and a hdr image )
thanks again kaynine for your help : )
Im at a bit of a lose ends now. So please excuse this question. Its been mentioned before but I cant find the answer for it. Ive set up the scene like in the instructions but it doesnt want to work.:sad:
In Maya Software the object doesnt render and in Mental Ray it keeps on coming up with:
API 0.0 error 301031: call to undeclared function “misss_fast_simple_maya”
API 0.0 error 301031: call to undeclared function “misss_fast_lmap_maya”
API 0.0 error 301032: while defining material “misss_fast_simple_maya1SG”: undefined shader “misss_fast_simple_maya1”
API 0.0 error 301032: while defining material “misss_fast_simple_maya1SG”: undefined shader “misss_fast_lmap_maya1”
Can anyone help me out, please? This shader looks damn good but Im just not having much luck getting it working. I only work in games so dont have much call for doing these fiddlier high end renders.:shrug:
Help will be very much appreciated. Thanks
Edit* and subsequently Mental ray does want to work at all since Ive installed the misss files. 
MX
Ive had No luck when trying to make the misss_fast_skin shader work with the mix8layer shader…
the scene will render without any sss … as if the mr lightmap texture was not attached to the skin shader node … (and i note that it seems as if the lightmap is not actually calculated )
I was sure that someone had found the solution to this problem … but i cant find any thread disscussing it here …
Anybody got any answers ?
This is an utterly fantastic shader by the way …
thanks to Master Zap
great shader… I’ve started messing around with it, and basically I’m wondering where would you plug a transparency map in the misss_fast_skin_maya shader??