Figure 1

This is a very easy tutorial, and I know plenty of other sites has covered this issue, but still I get so many e-mails from people asking how to make scanlines etc., so I decided to make my own tutorial about this.

First I'll show you how to make a little bit different pattern, and further down I'll show you how to make those classic scanlines.

First: Start by opening the image you want to apply the pattern.
I just made a new image (250 x 250 pixels) to show you how to create the effect...

Figure 2

Then create a new image 5 x 5 pixels, transparent background. The image in figure 1 is zoomed in a little bit to be more readable.

Make the color you want on your pattern your foreground color. Then Select - All.
Now go to Edit - Stroke - 1 pixel - Inside - Opacity 100 % and click OK.

Keep your selection and go to Edit - Define Pattern.

Go back to the image you started with, and be sure you create a new layer where you want to apply the pattern.

At the new layer - I called mine pattern - select the Paintbucket Tool and change the Fill options window from Foreground to Pattern.
(If you have PS 6 be sure to select the correct pattern in the Pattern drop down menu!)
Now fill your new layer with the pattern and your image should look similar to fig. 2.

This is a nice effect, but I wanted to spice it up a little bit. By adding a simple Bevel and Emboss to the layer your pattern could look like figure 3.
(PS 5.5: Layer - Effects - Bevel and Emboss.
PS 6: Add a new layer style - Bevel and Emboss).

I used this settings (PS 5.5):
Highlight:
Mode: Overlay, Opacity: 75 %
Shadow:
Mode: Multiply, Opacity: 75 %
Style: Inner Bevel
Angle: 120
Depth: 5 pixels - up
Blur: 1 pixel.

Use these setting if you use PS 6:
Style: Inner Bevel
Technique: Smooth
Depth: 500 % - Direction: Up
Size: 1 px

The Highlight and Shadow modes are the same...

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8