Re: [Gimp-user] Grayscale and alpha layers

[Ofnuts <ofnuts laposte net>]

On 10/21/2012 10:04 AM, Psiweapon wrote:

Is there any way I can directly make a grayscale image into an alpha transparency channel?

I mean, NOT involving selection? Because selection by color to layer mask, is really fucking up what I need to do thanks to the selection threshold.

Why is it damn easy to turn an alpha channel into a grayscale image but not the reverse?

With the grayscale image visible, open the Channels list and on any of the color channels: right-click+Channel to selection
Back on layer, add layer mask and initialize to selection