> One thing that has been bothering me is the "glass of water" type
> situation...I'm not sure POV handles it correctly or how to model it
> correctly.
>

Here it is necessary to double up your surfaces so the surface of the water
is slightly outside the surface of the glass. ie, the ray exits the glass
into air and then into the water.  There is no way to avoid increasing the
number of surfaces in this case if you want it to work correctly. For
something completely immersed int the water (or glass for that matter) this
isn't necessary (in case you think this is contradicatory to my previous
post).

-tgq

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