On 02/27/2012 01:13 PM, Stephen wrote:
> With the changes to the SSLT code in RC4 there is now only one
> controlling vector, translucency, instead of two, scattering and
> absorption. What if any is the relationship between translucency,
> scattering and absorption?
> Scattering and absorption made sense to me and the reference pdf gave
> values for some materials. So how do we go about using translucency?
>
I find the new method much more simpler ... I started with the scene 
file that was added ~scenes/subsurface/subsurface.pov and played around 
with it changing things and observing the affect. It's a simple scene 
and renders fairly quickly. I then graduated to a little bit more 
complicated object then started playing with that ... move the light, 
and/or change the camera view. Hint cylinders make a better test object 
(the edges) than say rounded (sphere). Don't forget to play with the 
scaling (mm_per_unit: smaller value makes it more transparent at the 
edges, larger lessens the affect) ... keep it simple at first until you 
get the hang of it, then graduate to more complicated shapes.

BTW: RC5 is on deck because of the bug report you lodged. clipka's fix 
also fixed a couple of other issues I found during testing, so it won't 
be prone to crashes due to improper usage ... a bit more robust. Don't 
get discouraged, it's a cool feature and well worth the seemingly 
tedious learning curve ... lastly the use of color vectors with a zero 
component is still problematic ... zero diffuse as well IIRC

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