[PD] gem alpha channel q

[Hans-Christoph Steiner]

Maybe you can convert alpha to a color, then invert the colors, then  
convert back to alpha.

.hc

On Oct 11, 2009, at 6:42 PM, rene beekman wrote:

>
> how does one invert an alpha channel in gem ?
> i've created an alpha channel from the rgb channels, but need the  
> channel to be inverted. somehow i can't seem to find a way to do  
> this...
>
> hope it is just sleep deprivation and i'm simply overlooking the  
> obvious... :)
>
> thanks in advance,
>
> rene
>
>
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