In article <3a151e4a@news.povray.org>, "Wlodzimierz ABX Skiba" 
<abx### [at] abxartpl> wrote:

> these values 1/3, 2/3 and 1 are in rgb space - each equal for red,
> green, blue, right ?
> but converted to grayscale they are not this values for gray, right ?

I'm not sure which conversion is used. A simple average would make the 
most sense for this application, because it would leave gray colors 
untouched, but it might use the same function used to convert color 
images to grayscale(if it does, it should be changed to use the average, 
in my opinion). I will check this out later...


> than there should be also in POV function grayscale( color ) with
> exactly the same algorithm

I have been planning this function as part of the color conversion 
patch(I have convert_colors() done, I'm trying to work up some good demo 
scenes), but there is one small problem: POV doesn't always use the same 
conversion function.

-- 
Christopher James Huff
Personal: chr### [at] maccom, http://homepage.mac.com/chrishuff/
TAG: chr### [at] tagpovrayorg, http://tag.povray.org/

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