ok, what i want is to have a ball bouncing (no problem) while being
illuminated mostly by an overhead spotlight (no problem) in a dusty room
(ie the spotlight beam is visible - PROBLEM).  i'm not really sure how
to do this, but maybe someone can help me? =)  here's the code i have so
far (rather, most of it... the pertinent part).  i'm pretty sure the
"media" part is wrong, but i have no clue what to change it to.

thanx for any assistance

media {
 scattering { 1, rgb 0.001 }
}

camera {
 location <-15, 10, -40>
 angle 30
 look_at <0, 2, 0>
}

light_source {
 <0, 25, 0>
 colour rgb 1.25
 spotlight
 radius 10
 falloff 15
// tightness 1
 point_at <0, 0, 0>
 area_light
 <0, 5, 0>, <0, 0, 5>, 5, 5
 jitter
 media_attenuation on
 media_interaction off
}

light_source {
 <-15, 10, -40>
 colour rgb 0.25
 shadowless
 media_interaction off
}

sphere {
 <0, 5, 0>, 2
 texture {
  BallTexture
 }
}

plane {
 <0, 1, 0>, -Rad
 texture {
  PlaneTexture
 }
}

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