Steve Martin <sma### [at] usitnet> wrote:
>
> I'd like to do some compositing with images from POV-Ray using the
> alpha channel in the TGA file. Unfortunately (and I can't believe
> I'm the first to notice this, so I assume it's something I'm either
> not understanding or doing wrong), it seems that the alpha channel
> in the rendered image file is "reversed" from what it should be
> (i.e. 0 instead of 255 and vice versa).

The alpha value should be 0 if the pixel is fully transparent, 255 if
fully opaque, and the values in between for partial transparency -- is
this what you're getting?

(In other words, it's the opposite of the transparency component in an
rgbt colour specification.)


-- 
Jeff Lee         shi### [at] gatenet         http://www.gate.net/~shipbrk/

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