Soft edge blending and madmapper
  • Mathouston
    junior Member
    Posts: 3
    Joined: Sun Jun 13, 2010 1:23 am

    Soft edge blending and madmapper

    by Mathouston » Wed Jun 01, 2011 4:16 am

    Hello,

    Is there a way to do softedge blending between two or more projector with madmapper ?

    And what is the blend mode : over premultiplied ?
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    david
    garageCube team
    Posts: 217
    Joined: Tue Jan 08, 2008 1:14 am
    Location: Antibes, France

    Re: Soft edge blending and madmapper

    by david » Wed Jun 01, 2011 11:35 pm

    Mathouston wrote:Is there a way to do softedge blending between two or more projector with madmapper ?

    And what is the blend mode : over premultiplied ?


    In 1.0, there is no softedge when using multiple output.

    Over premultiplied has to be used when the color of your input image/movie/Syphon was already multiplied by the alpha channel.

    Compositing with over is :
    result = alpha * source + (1-alpha) * destination

    with "over premultiplied" :
    result = source + (1-alpha) * destination

    This blending mode is useful with Syphon as the result of OpenGL rendering will premultiply the color passed to Syphon with the alpha channel.
    If you use the wrong blending mode for a given input, you will see a problem on edges (which will be too dark)

    Regards.
    David * GarageCUBE team * Modul8 developer
  • bernielomax
    member
    Posts: 14
    Joined: Wed Apr 25, 2012 4:02 pm

    Re: Soft edge blending and madmapper

    by bernielomax » Fri Jun 08, 2012 7:21 pm

    this would be possible If they would add some more blending modes, to madmapper. like softlight and so on....

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