The exhaust from the rockets is made with spheres full of emission media

#declare Rocket_Exhaust = difference {
 sphere {
  0, 1
 }
 cylinder {
  -1 * x, 0 * x, 1
 }
 material {
  texture {
   pigment {
    rgbt 1
   }
  }
  interior {
   media {
    emission Exhaust_Color * 5
    samples 10, 10
    density {
     spherical
     poly_wave 2
    }
   }
  }
 }
 hollow
 scale <10, .75, .75>
}


--
Kevin
http://www.geocities.com/qsquared_1999/
#macro _(r)#if(r<12)#local i=asc(substr("oqshilacefg",r,1))-97;
disc{<mod(i,7)-3,div(i,7)-1,6>,z,.4pigment{rgb 10}}_(r+1)
#end#end _(1)//KL

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