First, great rendering of realistic water.
Secondly, I found a IOR for seawater:  1.42.  Must vary anyway, as you said.
Also found what might be a useful thing, a refraction displayer java applet:
http://wigner.byu.edu/LightRefract/LightRefract.html
I couldn't seem to change the various parameters though, maybe with some
modifications...

Bob

"Chris Huff" <chr### [at] maccom> wrote in message
news:chrishuff-F2256D.20124901072000@news.povray.org...
|
| seawater is between 1.4 and 1.5.

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