"Chaps" <cha### [at] yahoocom> wrote in message
news:3bc17f7a$1@news.povray.org...
>
> To do what you say, I think that I would write something like:
>
> #declare Fondation_appear = 0.15
> #declare Fondation_disappear = 0.55
>
> #if ((clock > Fondation_appear) & (clock < Fondation_disappear))
>     #debug "Including Fondation\n"
>     #include Fondation.inc
> #end

Naahhh.  #switch with #range is so much easier to use for such a thing.  :-)
Have a look at the Doc about those.

Bob H.

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