3ce50a2b@news.povray.org...
> Can anyone give a quick explanation as to what they're for? For example,
in
> Gilles's post, why use a hf with the ridged mf rather than just using the
ridged
> mf directly?

Speed was already mentioned but in this case it was also the ability to use
a low res version during the tests. And I wanted to test the feature in a
real image too.

G.



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