Ah, I see.
  The problem is that the box is inverted. (It's implicitly inverted because
you are using a difference.)
  But there's a solution to the problem: Clip the entire CSG with for
example a box.

-- 
#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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