Slime <slm### [at] slimelandcom> wrote:
> I want the ability to specify a "transparency_map" for the entire texture

  Does this suffice?

#macro TextureWithTransparency(OriginalTexture, TransparencyFunction)
  texture
  { function { TransparencyFunction(x,y,z) }
    texture_map
    { [0 OriginalTexture]
      [1 pigment { rgbt 1 }]
    }
  }
#end

// Example:
#declare MyTexture =
  texture
  { pigment
    { granite color_map { [0 rgb <.5,.3,.1>][1 rgb <1,.6,.3>] }
    }
  }

#declare Transparency = function { pattern { bozo scale .25 } }

camera { location <1,2,-5> look_at 0 angle 35 }
light_source { <100,200,-50>, 1 }
plane { y, -1 pigment { checker rgb 1, rgb .5 } }

sphere
{ 0,1
  TextureWithTransparency(MyTexture, Transparency)
}


-- 
#macro M(A,N,D,L)plane{-z,-9pigment{mandel L*9translate N color_map{[0rgb x]
[1rgb 9]}scale<D,D*3D>*1e3}rotate y*A*8}#end M(-3<1.206434.28623>70,7)M(
-1<.7438.1795>1,20)M(1<.77595.13699>30,20)M(3<.75923.07145>80,99)// - Warp -

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