In article <401ae6a7@news.povray.org>, "Kneb" <cal### [at] yahoocom> 
wrote:

> 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?

It makes no difference whatsoever to the rendering. However, passing it 
as a macro parameter will allow you to make multiple versions with 
different amounts of transparency, defining it as a variable restricts 
you to that one transparency setting.

-- 
Christopher James Huff <cja### [at] earthlinknet>
http://home.earthlink.net/~cjameshuff/
POV-Ray TAG: <chr### [at] tagpovrayorg>
http://tag.povray.org/

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