misss_physical setup


#1

hey,

I wanted to figure out how to use this misss_physical shader to make some realistic sss fx for more translucent materials than skin and such so that I could actually see throught the object where its thinner. But I couldn't get it to work even with some tutorial help. So how do I make a basic setup to get atleast some result out of this shader? Is there some easier ways to get the same result?

here's how i tried to get it to work.

first i made sure that caustics and GI is working properly by making a simple scene with a cube, a plane under it and an inverted sphere around the scene. The cube had a blinn shader with refraction and transparency on. I got this part working nicely.

Then i made another cube with misss_physical in the material and photon shader slots and added the point light to the light array of the misss_phys. Is there something else i need to do?

This time i got a blank box like if it only had a surface shader on it.

I tried to mess with the attributes using some info about the shader on this site [http://www.lamrug.org/resources/physsstips.html](http://www.lamrug.org/resources/physsstips.html). But whatever I tried there was no effect. The milk tutorial in that link is a bit cryptic.

#2

Doesn’t sound as if you’ve missed anything. You may want to make sure that the misss_physical shader wasn’t broken in the release version of your software. Some recent Max-version (iirc 2010) introduced a faulty version of the shader, which had to be replaced by a shader from an older release.


#3

hmm… Good point. Wonder how to make sure it’s a bug?

I use Maya 2012 hotfix 4 x64.

Maybe there’s alternate way making realistic SSS effect for liquid substances? Maybe some Parti_volume_photon setup or something?

This should probably be in software specific section…


#4

How to fix misss_physical in Maya


#5

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