Alpha Channels can be used for anything. PlateMaker plug-in for Photoshop
allows an image to carry 256 channels, each one holding it's own unique set of
data. Each channel is limited to 8 bits I believe. It would be very interesting
if the user could map the channels to POV functions. We could then use as many
channels as we wanted to.

steve

Thorsten Froehlich wrote:

> In article <3720E730.86D07306@aol.com> , Bob Hughes <inv### [at] aolcom>
> wrote:
>
> > No sky_sphere huh, okay, I had one. 8 bits? Okay again, I set that to
> > more in case it was going to need more over the usual 24-bit image
> > capacity
>
> Well, when you generate an image with alpha-channel you get a 32-bit image.
> Only PNG supports more than 8 bpc, however, no program seems to support more
> than that (they reduce it to 8 bit again). And at least one program (the PNG
> import plug-in for PhotoShop 4.0 on the Mac) seem to have/had problems with
> PNG images over 8 bpc and an alpha-channel...
>
>       Thorsten
>
> ____________________________________________________
> Thorsten Froehlich, Duisburg, Germany
> e-mail: Tho### [at] csicom
>
> Visit POV-Ray on the web: http://mac.povray.org

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