Christoph Hormann wrote:

> 
> After Marc Jacquier's impressive lighthouse images i also tried some new 
> things concerning breaking waves, here are the results:
> 
> http://www.tu-bs.de/~y0013390/pov/water/waves_tst.html
> 
> To get the foam look right is quite difficult, the structure of a real 
> wave is quite complicated when you have a close look.  And to keep the 
> render time reasonable (5-10 hours for these tests without radiosity) i 
> did not use scattering media so it probably looks much too 'glassy'.
> 
> There is surely a lot of room for tweaks, especially directly at the 
> water line but every additional feature slows down the whole render...
> 
> Christoph


Christoph, I'm guessing that foam is one of two things:
  * a foamy function with actual 'air holes' in it, using a really high 
max_trace_level
  * a noise-perturbed layer of function with a similar function-based 
pigment to achieve the foamy look

At any rate, it's a step foward for making more realistic isosurface 
waves. As Marc pointed out, a foward motion to the waves (and 
eventually, downward?) would make it more realistic.

-Sam Benge

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