> Have you actually tried OpenEXR? This file format *does* support alpha

   (In moments like this one, I realize how appropriate was the choice 
of the name for my site domain... :)

   No, actually I didn't try OpenEXR... I tried Radiance (.hdr), which 
doesn't support alpha, and I assumed this was the only HDR output in 
POV-Ray 3.7! I should read the new docs ASAP...

   BTW, I just tried OpenEXR output and it worked perfectly for light 
mapping, as soon as I found out that I had to adjust the the 0-1 range 
to 0-255 (thanks, Sam: I realized it when reading your latest post!).

   #local RED = pigment {
     function { ft_pigment(x,y,z).red * fp_lightmap(x,y,z).red/255 }
     color_map { [0 rgb 0][1 rgb <255,0,0>] }
   }


>>
http://news.povray.org/povray.general/thread/%3C4ca53804$1@news.povray.org%3E/?ttop=355419&toff=50
>
> I see. Looks like a POV-Bug. Have you considered filing a bug report
> before it is too late ;)

   Did I ever mention that I'm waaaay too lazy? ...well, OK, only for 
this time I will try overcome my aversion for bug reporting.

> which reminds me that I wanted also report
> one more definite bug but for the moment I cannot remember what it was.

   :)


   Thanks for your excellent advice, as usual...

-- 
Jaime Vives Piqueres
		
La Persistencia de la Ignorancia
http://www.ignorancia.org

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