Anders K. <and### [at] f2scom> wrote:
: Any other ideas, anyone?

  Thinking about how the raytracing/lighting algorithms used in povray work,
I have the feeling that it's not possible.
  A shadow is just a non-lit part of the pigment of a surface. This means that
the light source does not contribute to lightening up that part of the surface
pigment. That is, the pigment just gets darker.
  If there's no pigment to show, there can't be a darkening of this pigment
either.

  It might be possible using other methods than lighting calculations. It may
be possible to make a copy of the object and apply a proper semi-transparent
black pigment to it. Then this object is skewed and scaled properly so that
it looks like projected onto the plane. This way you would have an actual
object which looks like the shadow of the original object.
  I'm not sure yet of the exact transformations needed for this "shadow"
object.

-- 
#macro N(D,I)#if(I<6)cylinder{M()#local D[I]=div(D[I],104);M().5,2pigment{
rgb M()}}N(D,(D[I]>99?I:I+1))#end#end#macro M()<mod(D[I],13)-6,mod(div(D[I
],13),8)-3,10>#end blob{N(array[6]{11117333955,
7382340,3358,3900569407,970,4254934330},0)}//                     - Warp -

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