Robert DeVet <rde### [at] istarca> wrote:
: I'm making a dirt tunnel for a IRTC image. Most and up looking like
: brownish backgrounds, with a white circel (the sky, visible through the
: tunnel) No matter what I do, the tunnel looks flat, and not 3-d at
: all... Any advice? I've tried lighting it from outside and from inside.

  Do you mean something like this?

camera { location -z*25 look_at 0 angle 40 }
light_source { <0,9,-10> color 1 }

difference
{ cylinder { 0,z*100,10 }
  cylinder { -z,z*101,9.9 }
  pigment { rgb 1 }
  normal { bumps .5 scale 2 }
}

-- 
                                                              - Warp. -

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