>     It didn't work...

Information about *how* it "didn't work" is very useful in trying to
determine someone's problem. Specifically,

 - Was there a parsing error? What was it? What line was it on?
 - Did the scene parse but have unexpected output? What did you expect and
what was the actual output?

After adding a closing bracket to the end of the interior block in your
code, the code works fine for me. Make sure your enclosing object has a
transparent surface and that it is "hollow."

By the way: I believe confidence and variance have no effect with media
method 3. With method 3, the important parameters are intervals, samples,
aa_level and aa_threshold.

 - Slime
 [ http://www.slimeland.com/ ]

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