"Alain" <ele### [at] netscapenet> schreef in bericht 
news:467656d5$1@news.povray.org...
>>
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> You can use .red, .green, .blue, .x, .y or .z when you have a B/W image or 
> pattern. This will save you render time (for an isosurface) as you only 
> evaluate 1 colour component instead of evaluating all 3 and averaging 
> them.
> You must use .gray when you have a colour image or pattern.
>

Yes, of course, that makes sense!  :-)
Thanks Alain.

Thomas

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