Hopefully someone can help or tell me why what's happening is.  I've taken
one isosurface object and CSG'd it with another to produce a tube-like
object.  Unfortunately the inner surface of the tube isn't visible and
makes anypart of the tube behind the inner part (from the camera's angle)
transparent.  Anyone know what's going on?  Here's my code with the object
cross-sectioned so you can see what I'm talking about.

#declare R1=3;
#declare tor1=
isosurface{

function{sqrt(pow(sqrt(pow(x,2)+pow(z,2))-R1,2)+pow(y,2))-(atan(x/(abs(z)+.0000001))/pi+1)}
  contained_by{sphere{<0,0,0>,5}}
}
#declare tor2=
isosurface{

function{sqrt(pow(sqrt(pow(x,2)+pow(z,2))-R1,2)+pow(y,2))-(atan(x/(abs(z)+.0000001))/pi+.8)}
  contained_by{sphere{<0,0,0>,5}}
  inverse
}
intersection{
  object{tor1 pigment{Green}}
  object{tor2}
  plane{y,0}
  pigment{Red}
}

Post a reply to this message