Hi!

I do attach a small picture which shows what I mean.
The edges are really bad at the pen's main part. (On the right in the
picture:)

What can I do against this?
Are there some general settings which could prevent this?

If rendered in a smaller form, the edges/texture are even worse.

Greetings
Dieter

#macro pen (pr,pml,peakl,number_of_sides,maintex,peaktex,minetex)
// pr = penradius; pml = pen main part length; peakl = whole peak's length;
// number_of_sides = number_of_sides;
// maintex / peaktex / minetex = texture of main part / peak / mine
  #local mineradius = pr/3.8;
  #local plane_x = cos( 2*pi/number_of_sides / 2 ) * pr;
  #local i=0;
  intersection{
    union{ cylinder {0 <0,pml,0> pr }
           cone{ <0,peakl/10,0> pr*11/10 <0,-peakl,0> 0
              texture { gradient y
                      texture_map {
                        [ 0.0 minetex ]
                        [ 0.3 minetex ]
                        [ 0.35 peaktex scale peakl/2]
                        [ 1.0 peaktex scale peakl/2]
                      }
                      scale peakl
              }
           }
    }
    #while (i<number_of_sides)
        plane { x, plane_x
          rotate y*i*360/number_of_sides
        }
        #local i=i+1;
    #end
    texture {
      function{sqrt(x*x+z*z)}
      texture_map {
        [ 0.0 maintex ]
        [ 0.94 maintex ]
        [ 0.94 minetex ]
        [ 1.0 minetex ]
      }
      scale pr
    }
  rotate z*-90
  }
#end

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Attachments:
Download 'pen.jpg' (5 KB)

Preview of image 'pen.jpg'