Viewing layer masks

Although the layer mask thumbnail in the layers palette provides you with a small preview of the mask's content, it is very small and you can't always see the subtle paint effects that reside within your mask. If you hold down the alt(PC)/option(Mac) key while you click on your layer mask thumbnail it will become visible on the canvas, exactly like you'd see it if you made it visible while hiding the composite channel in the channels palette. This is a quick method to have a look back at how you've edited your masks. Alt(PC)/option(Mac)-clicking on the mask thumbnail again hides the mask and returns the canvas to normal.

15 I Return to the channels palette and load your halftone channel as a selection once again. Invert the selection and create a new layer at the top of the stack in the layers palette. Choose a darker flesh foreground color than the one you used previously. Paint over shaded areas of his skin within the active selection on the new layer to add darker, halftone shading effects. Next, switch the foreground color to an extremely light flesh color, almost white. Paint within the selection to add highlight areas onto this skin, nose, and hat.

16 I Use a variety of different colors to paint over various areas of this layer to add shading and highlights within the active selection. Increase and decrease the brush diameter as necessary. Also, try reducing the opacity of your brush and painting over areas of the background to introduce different colors into already existing dot patterns. When you're finished, invert the selection and continue to paint on the current layer until you're satisfied with □ V*"a I "" [wSr^ the results and deselect.

17 I Open up the drawing.jpg file. Type Control(PC)/Command(Mac)-I on the keyboard to invert the image, creating a negative of the original. Select all and copy. Return to your working file and create a new alpha channel in the channels palette. Ensure that your new channel is targeted and paste the copied, inverted image into your alpha channel. Load the channel as a selection.

Inverting keyboard commands

Carefully pay attention to the keyboard commands you use when inverting. You can either invert an image or invert an active selection. Always remember that the keyboard shortcut for inverting an image is Control(PC)/Command(Mac)-I, and that the shortcut for inverting a selection is Control(PC)/Command(Mac)-shift-I. Remembering when, and when not to, hold down the shift key while using these keyboard shortcuts is essential to performing the correct operation each time.

18 I Create a new layer at the top of the stack in the layers palette. Set your foreground color to white and fill the active selection with white on the current layer. Deactivate the selection and use the move tool to position the contents of the layer so that the drawn bubbles nicely overlap the bubbles on the tub outline layer below. Target the top four layers that provide the painted, drawn, and halftone details, and add them to a new group in the layers palette.

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