Wasn't it SharkD who wrote:
>Mike Williams <nos### [at] econymdemoncouk> wrote:
>> There is one, but it's usually a lot slower than using actual
>> isosurfaces, so it's much less useful.
>
>I hope it's not slower, because that (as well as the visual artifacts 
>that occur
>frequently when using isosurfaces) is the primary reason I want to use it.

As mentioned on my page, there are some circumstances where you might 
gain speed advantages. With real isosurfaces, the parse time is 
negligible and the render time is large. With the approximation macro, 
the parse time is large and the render time is small. If you need to 
render the same object more than once (e.g. in each frame of an 
animation) then you can save the mesh data after it has been parsed 
once.

-- 
Mike Williams
Gentleman of Leisure

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