I want to create a Image of a brush stroke with a perfect alpha channel, but using the tools in the Selection menu doesn't result in a too perfect result.

Since it's also possible to paint in the alpha channel, is it possible to paint onto a layer and onto the alpha channel at the same time, so it creates a perfect selection?

or am I just doing something wrong when trying to create an alpha channel of a little more complex brush strokes?


  • What do you mean by "perfect"?
    – Farray
    Commented Mar 7, 2012 at 1:02

1 Answer 1


If you have the brush stroke on its own layer, ctrl+click the layer and then create a new alpha channel from the selection.

  • thx horatio, but that option isn't available to me, only "create clipping mask"
    – Roland
    Commented Mar 6, 2012 at 22:40
  • 1
    On the Mac, it's Cmd-click (on the thumbnail image in the Layers Panel). Control-click is the equivalent of a right click in Mac OS. Commented Mar 7, 2012 at 0:17

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