Rafal 'Raf256' Maj wrote:

> 
> Maybe clipping function value into range -1 .. +1 (or threshold-e ..
> threshold+e where e is i.e. 1e-3) is a good idea ? Or not ?

It's mostly a bad idea, especially for small e it will take very long. You 
better try to fit the bounding box as tight as possible around the surface. 
With such a clipping you remove information of the function and introduce 
unsteadiness. So it shows a weakness in the algorithm when doing this 
speeds the rendering up.

- Micha

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