"Allan" <all### [at] WholeCheesecom> schreef in bericht 
news:web.4675eaff753da72387a47510@news.povray.org...
> "Kirk Andrews" <kir### [at] hotmailcom> wrote:
>
>> Pov is looking for "function {GateF(x,y,z).gray}"  It will always require
>> ..gray or .red etc. if you are using a pigment function (including a
>> bitmap).
>
> DOH!  I re-read the section in the manual for isosurface at least three
> times today and still did not get that little item about the function
> looking for the .gray color component.  Now it renders perfectly.  Thank
> you, Kirk for providing a very useful example!  Examples like this should
> be in the manual!
>

If I remember well, somebody once said that, to gain a little bit of parse 
(and render?) time, .red (or .green, or .blue) would be preferable to .gray 
as POV-Ray only considers a grey image anyway.

Thomas

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