I've just started to work with blobs; and my blob isn't blobbing.  Are there
any web tutorials around on blobs and using them that are more extensive
than the POV tutorial?  I've played around with the threshold and strength
values for my spheres, but all i can get them to do is change size; not
join.



Mike Metheny
lon### [at] vtedu
http://loneshepherd.ml.org/

"When one's words are no better than silence, one should keep silent."

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Mike Metheny wrote:
> I've just started to work with blobs; and my blob isn't blobbing.  Are there
> any web tutorials around on blobs and using them that are more extensive
> than the POV tutorial?

Well, I think the best advice on blobs (at least the one that helped me
the most)
is that one must remeber that blobs are *fields of strength*, not
spheres or
cylinders. 
In order for two components to join, they must first of all intersect,
and the 
threshold value must be greater than the sum of their strengths in the
intersecting
area.
Another trick that helps a lot when designing blobs is using transparent
spheres
to visualize the edges of the components, so for each spherical
component you could
have something like:

/*
blob
 {threshold 1
  ...
  sphere {<1, 2, 3>, .5, 1}
  ...
 }
*/

sphere
 {<1, 2, 3>, .5
  pigment {rgbf <1, .8, .8, .8>}
 }


Hope it helps.

-- 
Martin Magnusson
Mar### [at] studentuuse
http://www.geocities.com/SoHo/9946/

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