Strange behavior with quick mask

Discussion in 'Photoshop' started by Robert Feinman, Feb 7, 2004.

  1. I create a selection and then switch to quickmask. I then
    go the channels panel and select this alpha channel for editing.
    I then apply something like curves or threshold to the mask.
    I see the changes on the screen, but when I exit the tool the
    alpha channel doesn't change or changes only very slightly.
    What's going on?
    Robert Feinman, Feb 7, 2004
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  2. Robert Feinman

    wes Guest

    It seems to me that I had this problem once before and what I had to
    remember to do was to make a new alpha channel again to save the changes
    that I made.
    It doesn't seem to save the changes you made onto the same channel.
    wes, Feb 7, 2004
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  3. Robert Feinman

    Flycaster Guest

    Since the adjustments you are making only affect the mask/selection itself,
    the changes are not going to be very large even on screen, much less in the
    channel mask thumbnail. I'm not sure how accurate the thumbnails are
    anyway, so if your adjustments give your the desired result I wouldn't worry
    about it.

    And...if I misunderstood, please clarify.
    Flycaster, Feb 13, 2004
  4. Robert Feinman

    Flycaster Guest

    It occurs to me that I should have added a caveat regarding the feathering.
    If the selection/mask is feathered, your adjustments will have an effect on
    the mask (relative to the amount of feathering), but this will still be
    rendered approximately in the thumbnail. OTOH, and I don't mean to belabor
    the obvious, if the feathering is set to zero, your adjustments will have no
    effect whatsoever either on the mask or the thumbnail.
    Flycaster, Feb 13, 2004
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