Help!  I'm trying to simulate tube lighting, and I'm not understanding 
the results I get from a single dimension area light.  Given the following 
scene, how come I don't get a line of illumination?

camera { 
  location <1, 20, -20> 
  direction 1.5*z 
  right x*image_width/image_height 
  look_at 0
}

light_source { 
  <0,1,0> rgb 1
  area_light <20,0,0>,<0,0,1>,20,1 
  adaptive 1 jitter
}

plane { y, 0 pigment { color rgb <0,0,1> } }
plane { z, 1 pigment { color rgb <1,0,0> } }


-- 
Rich Allen
(Remove SPAM from my address to reply by e-mail)

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