One comment, but not to the caustics:

>          pigment
>          {
>             color rgbf <0.3, 0.0, 0.0, 1.0>
>          }     

You put the filtering effect into the texture. A thin drop of wine will
then have the same filtering effect as a deep pool of wine. My experience
with red wine (which is little enough, as I always prefered white wine)
is different. Therefore I would put the filtering effect into the material's
interior, like this:

   pigment {transmit 1}
   interior {media{
     absorption <0,1,1>*some_factor
   }}

I am no expert on making good materials, so treat my advise with caution.


-- 
merge{#local i=-11;#while(i<11)#local
i=i+.1;sphere{<i*(i*i*(.05-i*i*(4e-7*i*i+3e-4))-3)10*sin(i)30>.5}#end
pigment{rgbt 1}interior{media{emission x}}hollow}//  Mark Weyer

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