In this article I'll show you to how to create a realistic looking seashore.

Step 1.
Create a new 450X350 pixels document. Set a dark blue color (#146fe0) for a foreground and light blue color (#0fe0ff) color for a background. Apply Filter > Render > Clouds.

Create a new layer. Apply Edit > Fill > White color. Set white color for a foreground and light blue color (#acc6f0) color for a background on this layer. Apply Filter > Render > Fibers with the following settings: Variance -> 26, Strength -> 13 and set the Blending Mode as 'Color Dodge'. Merge down these layers.

Step 2.
Duplicate this layer. Go to a new layer 'Background copy'. Now we have to make horizontal fibers from vertical. Apply Edit > Transform > Rotate 90CW and then apply Edit > Transform > Scale and stretch this layer out full length.

Apply Image > Adjustment > Hue/Saturation with the following settings: Hue -> 194, Saturation -> 100, Lightness -> +12. Then apply Filter > Brush Strokes > Spatter with the following settings: Spray Radius -> 13, Smoothness -> 14.

Step 3.
Go to the 'Background' layer. Set a light green color (#daf4f8) for a foreground and light blue color (#b1daf2) for a background. Apply Filter > Render > Clouds. Go to the 'Background copy' layer. Choose the Eraser Tool and erase the upper part of the picture. Then go to the 'Background' layer and apply Filter > Render > Lens Flare with the following settings: Brightness -> 100%, Lens Type -> 50-30mm Zoom twice. Merge down this layers.

Step 4.
Now we can make a sand shore. Let's create a sand texture. Duplicate the layer. Go to the 'Background' layer and set a light yellow color (#f5ecb3) for a foreground and dark yellow color (#efd1ad) for a background. Apply Filter > Render > Clouds. Then apply Filter > Noise > Add Noise with the following settings: Amount -> 6,86%, Distribution -> Gaussian. A sand texture is ready. And now go to the 'Background copy' layer. Choose the Eraser Tool and erase the upper and middle part of the picture. And that's it.