Eric wrote:
> There are many ways I've seen to simulate water, but all are really
> illusions on a uniform surface.  So if you have a vertical surface coming
> straight up out of the 'water', you get a perfectly straight line at the
> intersection.  What options are there that will form actual height-ripples
> in a surface?  I know of bump_map and height_field, all of which require an
> image for the height field, but I'd rather not go that way.
> 
> Thanks!
> -Eric
> 
> 

Bump mapping isn't really implemented in POV-Ray, at least not the way 
you're probably thinking from the above.

Most people use isosurfaces, which are surfaces defined by equations. 
Here's a simple scene using one:

camera {
  location <0,10,-15>
  look_at 0
}

isosurface {
  function { cos( sqrt(x*x+z*z) ) +y }
  threshold 0
  max_gradient 1.5
  contained_by {box {<-100,-2,-100>,<100,2,100>}}
  pigment {color rgb 1/2+z/2}
  finish {specular 1/2}
}

light_source {<1,1,-1>*100 color rgb 1}

...Chambers

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