Hi,

> 
> I'm attaching a POV file to this message. It isn't really an example
> of a non-smooth blob, but it is one of the more unusual blob shapes I
> have come up with. It really seems counter-intuitive to the way that
> blobs were supposed to work. I'd be curious to see what you can do
> with an exponential blob render, using my scene file.

Hmm, that's _very_ counterintuitive with standard blobs! Here's a quick
replacement with exp blobs. I just copied the values straight in, and it
seems to work fairly sensibly. I had to fake the texture with a x
gradient
though.

Scene and image below.

--John

#global_settings { assumed_gamma 1.0 }

background { color rgb 0.667 }

camera { perspective 
         angle 15
         location <0, 0, -10>
         look_at  <0, 0, 0>
       }

light_source { <10, 20, -30> color rgb 1 }

#declare SB_Fin = finish { ambient 0.01 diffuse 0.99 } 

#declare fn_gauss = function(x,y,z,r) { - exp(-(x*x + z*z + y*y)/r) }

#declare fn_blob = function(x,y,z) { (fn_gauss(x+1, y, z, 1.9) * 0.68 + 
                                      fn_gauss(x-1, y, z, 1.9) * 0.68) 
}
                                      
                isosurface {
                  function { fn_blob(x, y, z)  }       
                  contained_by { box { -5, 5 } }  
                  threshold -(2/3)
                  accuracy 0.001                      
                  max_gradient 2.0                      
                  finish { SB_Fin }
                  pigment { gradient x 
                    color_map {
                                [0.0 color rgb <1.0, 0.85, 0.7>] 
                                [1.0 color rgb <0.7, 0.85, 1.0>]
                              }           
                    scale 3
                    translate -1.5*x
                 }               
                scale 0.9  // compensate for exp func.                
        }

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Attachments:
Download 'gb_strange_blob_exp.jpg' (9 KB)

Preview of image 'gb_strange_blob_exp.jpg'