David Vincent-Jones (geo### [at] galaxynetcom) wrote:
: I am trying to achieve in an image similar bright information lights - like
: a traffic light or a car tail-light - without coloring the entire image from
: that light.

  There are two possibilities:
  a) You want only a light source to be seen, but not necessarily illuminate
anything (like a little led or something like that). Don't put any light
source, but put an object with finish { ambient 1 }. This object will look
like it's emitting light (because it's bright even if there's not any light
source in the scene). It's also fast to render.
  b) You want a light source that actually illuminates the objects very
near to it, but that diminishes very fast. Use a fading light with
a little fade_distance and fade_power set to 2 (this works a lot like real
light sources). Note that this will slow the rendering because this light
source is checked for every pixel in the scene, so if you put 1000 light
sources like this, it will be quite slow...

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