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Notes on Lesson 04 - Layer Mask | PiXimperfect

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Notes

the purpose of the mask is to hide parts of the image

setup a mask

  1. select the text

  2. click on the mask button in the layers pane

    • this will add a white square to the right of the text entry
    • /notes/graphics-piximperfect/media/commit/8d138f51c886044f68986b035092fde95bc29751/_share/media/img/photoshop-beg-piximperfect/lesson3-1.png

The concept of a layer mask is that

  • black areas are hidden
  • white areas are shown

so select the layer mask and draw with black on the center panel to hide or show areas

to hide and show the layer mask

  • hold the alt/opt key and click on the layer mask
  • you can also click on any other layer, or outside the layer mask to hide it

reason 1: non destructive abilities

while you can certainly delete parts of an image and putting something else in it's place, you cannot undo that deletion so easily.

  1. select the area you want to show
  2. hit the mask button (this will automatically hide everything not selected)

hide the selected area (2 methods)

method 1
  1. selecte the area you want to hide
  2. select->inverse
  3. hit the mask button
method 2
  1. select the area you want to hide
  2. ALT/OPT + mask button

compatibility with non raster layer

  1. place an image on top of a background

    • Photoshop->Settings->General->Always Create Smart Objects When Placing
    • the image is going to be selected as a mask

  2. go to the backround layer, select subject the subject

    • note that "select subject will be highlighed"
    • /notes/graphics-piximperfect/media/commit/8d138f51c886044f68986b035092fde95bc29751/_share/media/img/photoshop-beg-piximperfect/lesson4-1.png

  3. return to the imposed layer and create a negative mask

    • alt+mask button on layers

  4. at this point you can blend the layers if you like

    • double click top layer, you'll open to blending options

    • move the sliders in underlying layer to get what you want

      • if you hold down the ALT key, and hover over the slider, you can split and drag it

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