Fill the background layer of your document with a dark gray color. Select Filter > Noise > Add Noise to bring up the Add Noise dialog box. Set the Amount to 50% and check the Monochromatic option, as shown at right.
Next, select Filter > Blur > Gaussian Blur and set a
, . m „ , Radius of .5 pixels (half a pixel) in the dialog box.
Adding a Gaussian Blur effect r ^ 0
Now select Edit > Fade Gaussian Blur or press 5hift-Ctrl-F (5hift-Command-F on a Mac) to bring up the Fade dialog box and fade the effect by 90%. Remember, the fade command will be unavailable for the blur effect unless you select it immediately after you've added the Gaussian Blur.
Apply the Offset filter (as described in the solution for "Making a Seamless Tiling Background"). You may be able to pick out faint edges. Use the Clone Stamp Tool (5) with a hard-edged brush to hide the edges by cloning areas of the existing pattern (for more details on using the clone tool, see the solution using photographs for "Making a Seamless Tiling Background").
In the example shown on the right, the blue cross shows the areas I've cloned. Usin9the clone to°'
The result is shown below—a seamlessly tiling image that looks like granite stone. If only it were that easy to make granite in real life!
Granite stone background image
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