"Marvin Taylor" <pov### [at] maltasoftcom> wrote...
> By using #macro rather than #define you can pass the parameter rather
> than using a variable; hopefully this works for you.

Are there any significant differences between (a) passing the transmittance
as a parameter to a macro and using #macro, and (b) defining the
transmittance in the scene file and using #define?
Thanks,
Kneb

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