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    Default Adobe Photoshop Complete Course | Lecture 36

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    6. Try to click alternately on the mask (the thumbnail) as seen above, and on the picture itself. It is hard to see if anything happens in the layer beam, but it works: The picture and mask get alternately active for editing.

    Figure 41. The Layer mask is seen as a miniature image to the right of the picture thumbnail. Either the mask or the picture is active for editing.
    Work in the mask

    You have a picture that right now is completely coevered by a (black) mask. Let us work on the mask.
    1. The picture looks empty; you see the chckered background, which indicates that there are no pixels here. Click in the mask miniature to activate it.
    2. Select the brush tool (press b). Choose a soft brush in size 100 pixels.
    3. Choose the default colors (press d) – here it will be white/black, siince the colors are reversed in a mask compared to the normal.
    4. Paint some brush strokes in the empty picture surface. The picture appears! Why? Because you (as usual) paint with the foreground color, which here is white. The mask’s black areas are hidden. But where you paint with white, the areas become visible:

    5. So the white brush breaks a ”hole” in the mask. You can also see that in the layer mask’s thumbnail in the layer beam:

    6. Paint a little more, and notice the effect both in the picture and in the mask thumbnail.
    7. You can always de-activate the mask by clicking on the mask thumbnail while you hold the Shift- key down. Try that:

    8. The mask is re-activeted with a simple click in the thumbnail. Do that. Try to reverse the two colors (press x). Now paint with black – so you can close the mask, so it covers the whole picture. Can you see the system?
    9. Try to choose a gray color and paint with that. It might be a little difficult to see, but it results in partial tansparency in the mask when you paint with that.
    10. Finally paint with black, so the whole mask is closed (and you cannot see any picture). Save the picture as calme.psd, and leave the image file open in Photoshop.
    Look through the layer mask

    Now you will continue working with the mask. You do that by inserting a new picture, which will be blended into the existing.
    1. Open the image file jaguar.jpg in Photoshop. Make copy of the picture with Control+a and Control+c.
    2. Switch to the image file calme.psd, and insert the copy there (Control+Tab and Control+v).
    3. Now you have two pictures each on their own layer in the same image file. Drag the new layer (Layer 1) down below Layer 0. Rename the two layers to calme and jaguar, like here:

    4. It is still the car that is seen, since the black mask hides all picture data from the calme layer. But we can change that easily. Select the mask (but not the picture!) in the calme layer:

    5. Choose the default colors (press d), and fill the whole mask with the foreground color white (press Alt+Backspace). The mask will be colored white:

    6. This means that all the layer’s picture data are seen now, and therefore the car is no longer seen. Now select the brush tool (press b). Choose a soft brush in size 100.
    7. Reverse fore- and background colors by pressing x. Now paint in the mask. Because you paint with black, you get to look down to the underlying layer:

    8. Use the brush to make the whole car visible. Try to reverse the two colors again (press x) and paint with white. Then you can cover the car. You will need to reverse fore- and background colors repeatedly.
    9. When the whole car becomes visible, you need to reduce the brush’s opacity to 50%:

    10. With white as foreground color you can now cover part of the car with a thin ”water layer”, so it looks as if the car is on its way out of the sea.
    11. Save the image file.

    Figure 42. The mask makes the car come only partly out of the water.

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