Thanks Ken.  Yes, and in the Scene help looking up BLOB you get:

BLOB:

blob { BLOB_ITEM... [BLOB_MODIFIERS...]}

BLOB_ITEM:

sphere{<Center>, Radius, [ strength ] Strength [COMPONENT_MODIFIER...] } |
cylinder{<End1>, <End2>, Radius, [ strength ] Strength
[COMPONENT_MODIFIER...] } |
component Strength, Radius, <Center> |
threshold Amount

COMPONENT_MODIFIER:

TEXTURE | PIGMENT | NORMAL | FINISH | TRANSFORMATION

BLOB_MODIFIER:

hierarchy [Boolean] |
sturm [Boolean] |
OBJECT_MODIFIER

Opposite of the Insert menu item Shapes/blob.  I believe the Insert menu is
incorrect, although it isn't all that easy to tell.  Fact is if you change
the first float value after the position vector(s) it obviously changes the
size, whereas the second (strength?) float does not.  Always confusing
unless you use it a lot sometime and have a good memory between times the
blob is used.  And btw, I may have mentioned it before here at the
newsgroups and got it backward then, don't know for sure : )

Bob

"Ken" <tyl### [at] pacbellnet> wrote in message
news:38587FFD.57C85C40@pacbell.net...
>
>
> Peter Popov wrote:
> >
> > On Wed, 15 Dec 1999 21:55:11 -0600, "omniVERSE" <inv### [at] aolcom>
> > wrote:
> >
> > >That strength/radius switch in blob is really confusing.
> > >
> > >Bob
> >
> > Can you please explain (or point out the correct post for me) this
> > blob problem so that I can keep track of it? Thank you.
>
> This thread concerns the premade insert menu files. The one Bob is
pointing
> out comes from the insert menu for the blob object. In particular he is
> refering to the way the radius and blob strength is defined for that
object
> as follows:
>
> // create a smooth blobby shape
> #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>, StrengthVal, RadiusVal }
>   cylinder { -z, +z, 0.1, StrengthVal, RadiusVal }
>   // [sturm]
>   scale 2
> }
>
>
> --
> Wishing you Seasons Greetings, A Merry Christmas, and A Happy New Year !
> Ken Tyler -  1200+ Povray, Graphics, 3D Rendering, and Raytracing Links:
> http://home.pacbell.net/tylereng/index.html http://www.povray.org/links/

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