Re: [umax] Can't use 10-bit scan: "preview cannot handle depth 16"

Michael Sweet (mike@easysw.com)
Thu, 07 May 1998 19:57:42 -0400

Kenneth Crudup wrote:
>
> I know that at least some of the current OpenGL-capable PC graphics
> cards support real 32-bit color information in a variety of
> configurations (RGBA = 8:8:8:8, 10:10:10:2, etc.)
>
> What *is* the "alpha channel", anyway?

It is used for some special effects, and for live video overlay work
you can use it to overlay graphics over video...

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