Oleguer Vilella <ole### [at] infonegociocom> wrote:
> I want a only a half of it.

  A half is very easy: Just difference a plane (or perhaps a box) from it.
Something like this:

difference
{ torus { r1, r2 }
  plane { z, 0 rotate y*45 }

  // textures and transformations
}

-- 
#macro N(D)#if(D>99)cylinder{M()#local D=div(D,104);M().5,2pigment{rgb M()}}
N(D)#end#end#macro M()<mod(D,13)-6mod(div(D,13)8)-3,10>#end blob{
N(11117333955)N(4254934330)N(3900569407)N(7382340)N(3358)N(970)}//  - Warp -

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