> - Your absorption is simply too weak. Try absorption <1,1,1>*30 instead.
> Depends on how dense your density map actually is, though. Note that the
> smaller the distances in your scene are, the higher your media
> parameters have to be for the same effect.

If you want realistic results, each component of absorption must be 
equal to or greater than the emission component.  Making them equal 
gives you a pure glowing effect, whereas adding a bit more absorption 
gives you some smokiness.

In nature, everything which emits light also absorbs that same frequency 
of light to the same degree.  We see only the light that is at the 
outermost edges of the glowing object, but we're used to this.

Regards,
John

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