lordfallout Posted January 22, 2008 Share Posted January 22, 2008 Hello, i've got a image, it contains a red channel only, i would like the red channel in this image to be a alpha channel, the darker the red the more alpha, i.e. 255 red, 255 alpha. 0 red, 0 alpha, i've tried blending but i cant seem to get the right result, is there a way to convert a single channel? Quote Link to comment Share on other sites More sharing options...
Ash Posted January 22, 2008 Share Posted January 22, 2008 viewtopic.php?f=16&t=22215 Quote All creations Ash + Paint.NET [ Googlepage | deviantArt | Club PDN | PDN Fan ] Link to comment Share on other sites More sharing options...
Tanel Posted January 22, 2008 Share Posted January 22, 2008 The simpliest way is to use Curves+ plugin. Choose Advanced mode, in: Red, out: Alpha. Default curve shape (straight line from bottom left to top right) represents 1:1 conversion from red to alpha as you described (R255->A255). You may want to bend the curve to adjust the effect. Reversed curve (top left to bottom right) converts in opposite direction (R255->A0). http://paintdotnet.forumer.com/viewtopic.php?f=16&t=22215Color to Alpha plugin may be too difficult to set up for that task. Thanks for publicity, though. :wink: Quote Link to comment Share on other sites More sharing options...
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