> If I understand you correctly, the 'reflecting lights' are shadowless light
> sources with low values that emulate inter-reflected light from other objects?
> For example, if I have a scene with a red car, I might place a red shadowless
> light near the car to 'help' cast scattered light...?  It seems you'd have to be
> careful not to allow the light to shine back on the object you're emulating.
> (Or, perhaps I've misunderstood what you're trying to get across.)

You are right. To avoid the wrong object to being lighted up, use spotlights,
shining away from these objects.

> Interesting!  So, in a real photography setting, how do you add a light
source
> that doesn't cast a shadow?

Actually is cast a shadow, but there are two important things:

1: the power of reflecting light is (in most cases) _much_ smaller then the
main-light.
2: when light is reflecting from an object, it works like a area-light. That
means very blurry shadow.

I've made a a little move that shows in a very nice way, what happens, when
light is reflecting in a room.

Its an animated gif.

best regards,

Holger

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