Here it is, the true septic in all its glory! A million thanks to both Ron
and Adam, especially Adam, without whose help this would not have been
possible. Enjoy.



//anthony bennett
//bennetts@panama.c-com.net
//http://welcome.to/TonyB

//8-12(01)2000

background {rgb <0,1,2>/3}

camera
{
 location <1,1,-1>*65
 look_at 0
}

light_source {<1,2,-3>*100 1}

#declare D = 0.2;

isosurface
{
 function
  z^2*(z-1)^2*(z+1)^2+D*(x^7-21*x^5*y^2+35*x^3*y^4
 -7*x*y^6+7*x^6+21*x^4*y^2+21*x^2*y^4+7*y^6-56*x^4
 -112*x^2*y^2-56*y^4+112*x^2+112*y^2-64)
 method 2 max_gradient 100000 sign 1 threshold 0
 bounded_by {sphere {0,6}} scale 6
 pigment {rgb <2,3,1>/2.5}
 finish {specular .5 roughness 1/200}
 rotate x*70
 rotate -y*5
 rotate -z*10
}

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