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<dav### [at] intrepidvoygrcom> wrote in message news:3bbb3503@news.povray.org...
> Tom,
>
> I've picked up MegaPov and tryin to learn Iso Surfaces... I was never much
good at trig.. time to brush up.. :)
>
> Thanks for all yoru help everyone!
>
There are some excellent iso-tutorials around - check the povray links. For
simple rocks, you might find a few blobs plus some normals would do the job -
e.g.
#declare StrengthVal = 1.0 // (+ or -) strength of component's radiating density
#declare RadiusVal = 1.0 // (0 < RadiusVal) outer sphere of influence on other
components
blob
{
// threshold (0.0 < threshold <= StrengthVal) surface falloff threshold #
threshold 0.6
sphere { < 0.75, 0, 0>, StrengthVal, RadiusVal }
sphere { <-0.375, 0.65, 0>, StrengthVal, RadiusVal }
sphere { <0.375, 0.65, 0.2>, StrengthVal, RadiusVal }
sphere { <-0.175, 0, 0>, StrengthVal, RadiusVal }
sphere { <-0.175, 0, -.25>, StrengthVal, RadiusVal }
// [sturm]
scale 2
pigment{agate pigment_map{[0 Gray40][1/2 Gray50][1 Gray60]}}
normal{granite}
normal{agate}
}
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