Slime wrote:
>> Damn I wish I knew what the hell you're talking about :) "gradient" to me 
>> is
>> a setting that has to be big enough for isosurfaces to work. I have no 
>> idea
>> what it really means...
> 
> Well, the gradient of a function at a point is a vector describing the 
> function's greatest rate of change and the direction of that change.

Right.  My mistake was assuming it was the maximum rate of change y with respect to
projected position on x-z plane of the isosurface f(x,y,z) = 0.   But of course
there's no preferred axis for an isosurface, so that definition makes no sense...

Thanks for the correction!

Dan

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