> Like this?
>
http://news.povray.org/povray.binaries.animations/thread/%3Cweb.4b02da71bde7fd6d299b4a940%40news.povray.org%3E/
> That 256x256x256 df3 took a few minutes to generate on my machine, so the 
> proof of concept works.

Hehe I just did the same :-)  Mine was 1024x1024x1024 df3 file which took 
about half an hour multithreaded under c#.net (I decided the speedup I could 
get by easy multithreading in c# outweighed the speedup I could get with C++ 
over C#).  The render only took about 2 minutes, it's just an isosurface and 
a few lights.

> I haven't optimized the code too far yet, it's still using the trig 
> functions, but it can be used for any value N.

Yeh mine too, it looks like there should be a way to lose the trig even with 
N=8, but it might get a bit scary...

> Unfortunately it's not multi-threaded yet either, but as soon as I learn a 
> bit more about how to write that, the structure of the code will require 
> very little modification to allow that.

Yeh, I chose to do it under C# because it's very easy to do the 
multithreading on there and I have no experience of doing multithreading on 
normal C++.  I just wanted to get something working this afternoon to see 
what it looked like.

The issue is that the isosurface is still made up of millions of little cube 
shaped voxels, I think the only way to improve that is to write a 
fractal-ray tracer too!  Or maybe patch POV...

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