I'm trying to use POV-Ray to plot some mathematical 3d functions, and I can make
a simple plot of the function, but I don't know how to make it look beautiful.

For example, I'm trying to plot this function

y=Sin(x)*Cos(z)

using this code:

isosurface {
function { sin(x)*sin(z)-y }
        accuracy 0.001
        contained_by{box{-2*pi,2*pi}} open
        max_gradient 5
        pigment {rgb .9}
}
camera {
  location <10,10,10>
  look_at   <0.0, 0.0,  0.0>
}

light_source { <50,50,50> 1 }
background { rgb <0,.25,.5> }

and I can get a result look like this
http://imgur.com/jxElYiI

but how can we make it look like this

http://www.mitchr.me/SS/mjrcalc/lispy/exPovWaveGraph-ART_p.png

Any suggestions and comments are appreciated.

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