> Wasn't it Nekar Xenos who wrote:
>
> >I don't know if it's a bug. But if you take a look at the code under
> >povray.text.scene-files you'll see  there is a section I marked out that
doesn't
> >want to cut off the edge. I've checked the placement and it is in the right
> >place so I must be missing something.

Looks like it - um... yes, that was me. Thanks anyway, I've already fixed it.
>
> Check the placement again. It's *not* in the right place.
>
>
>
> One way to visualize what's happening is to look at the detail with an
> orthographic camera, and to add a visible copy of the suspect difference
> to the scene
>
> E.g. temporarily change your camera to
>
>    camera {location <6,-4,0>
>         look_at <6,-4,10>
>         orthographic
>         }
>
> And temporarily add this at the very end of the scene
>
>    difference {
>       box{<4,-2,18>,<7,-5,-18>}
>       cylinder{<7,-5,19>,<7,-5,-19> 2}
>        pigment {rgb x}
>        translate <0,0,50>
>    }
>
> When you render that, you'll see that the suspect bit touches the main
> object in two places. You really don't want the one around <4,-5,*>, and
> the one around <7,-3,*> doesn't do very much.
>
> I reckon that the correct shape is more like
>
>    difference {
>       box{<4,-2,18>,<7.5,-4,-18>}
>       cylinder{<7.5,-5,19>,<7.5,-5,-19> 2}
>     }


At the moment I've got it at

difference {
                                box{<4,-1,18>,<7.5,-4.1,-18>}
                                cylinder{<7.5,-5,19>,<7.5,-5,-19> 2  }
                                   }


I'll see if -4 in the box works better than the -4.1 I've got at the moment, but
it's looking good now.
I also need to brush up on my trig (it's been about 12 years since I touched the
subject). If I had worked it all out with trig I guess I wouldn't have had these
problems.

Thanks Mike,

--
/* Nekar Xenos */#local N=<-20,40,100>;#local K=<20,-40,100>;#local R=seed(0);
blob{#while((K-N).x>0)#local X=N;#local N=N+<rand(R),rand(R),1>/3;#local N=(
vlength(N-K)<vlength(X-K)?N:2*X-N);sphere{<N.y,-N.x,N.z>,1,1 scale .02}sphere{N
,1,1 scale.02}sphere{<-N.x-40,N.y,N.z>1,1 scale.01}sphere{<N.x+40,-N.y,N.z>1,1
scale.01 }#end pigment{rgbt 1}interior{media{emission <2,4,5>*5}}hollow}

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