This question is a little tough to properly form, because of the nature of
Glows, and I think I know the general shape of the answer, just not the
value.

What I want to do is determine the radius of the Glow, which would
obviously have to be predicted on a threshold which I would provide which
would establish where I define the Glow to "end", so would have to be some
slope/gradient.

Lets assume I have one (I don't) for the sake of argument, and it would
take the form of a certain percentage of the intensity at the origin.

For each of the Glow types, what would the formula be?
If I had the falloff formula for each in a concise form my question would
be largely resolved.

The reason I want this is:
1) To be able to control the apparent height of an object which has a Glow
at the endpoint
2) For constructs which utilize Glows as vertexes, so suitable offsets for
the objects radiating from the Glow origin work correctly.

Thanks,
Ian

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