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Making a “Liquid” Channel
Open the image that you want to submerge.
In the Channels palette, select the Blue channel, right-click/Option+click the channel, and choose Duplicate Channel from the menu, as shown in Figure 43-2.
Figure 43-2: Choose Duplicate Channel from the menu.
In the Duplicate Channel dialog box, type something in the As text box, as shown in Figure 43-3.This names the copied channel whatever you type in the As text box. I’ve named my copied channel Liquid. I’m calling this channel the Liquid channel for the rest of the directions.
Figure 43-3: Type the name for the copied channel.
Select the Invert check box.
Click OK to close the Duplicate Channel dia- log box.The inverted copied channel appears at the bottom of the list of channels in the Channels palette, as shown in Figure 43-4.
Figure 43-4: The inverted Liquid channel appears at the bottom of the Channels palette.
Select the Liquid channel in the Channels palette.The Liquid channel appears in the image window.
Choose Filter>Blur>Gaussian Blur.
In the Gaussian Blur dialog box, set the Radius to 5.
Click OK to close the Gaussian Blur dialog box and apply the blur to the Liquid channel.
Choose Image>Adjustments>Levels or press Ctrl+L/z +L.
In the Levels dialog box, set the Input Levels by typing 35 in the Shadows text box, 1 in the Midtones text box, and 65 in the Highlights text box, as shown in Figure 43-5.
Figure 43-5: Type the Input Levels into the text boxes.
These settings remove most of the grays and make the channel smoother.
Click OK to close the Levels dialog box and apply the settings to the Liquid channel.Your Liquid channel should look something like the one shown in Figure 43-6.
Figure 43-6: The Liquid channel with grays reduced.
