You can create scanlines by creating a new pattern.
Ok.
Open a new document.
Make it 1 pixel wide x 2 pixels high and make sure the background is transparent.
You should now have a very small rectangle in a new window. Zoom in.
Now use the pencil change color to black and add one pixel to the top half of the rectangle.
You should now have something like this:
Ok now go to Edit>Define Pattern...
and name it Horizontal Scanlines and press ok.
You can close the 1x2 pixel document.
Now open your cars document and you can add them two ways.
1. Create a new layer then goto Edit>Fill...
and set it to pattern and select the Horizontal Scanlines.
2. Or you can select a layer that is already made and goto Layer>Layer Style>Pattern Overlay and select the Horizontal Scanlines there. I like this one cuz you do get a little more control but it only applies to the layer you selected.
Then all you do is mess with the settings like opacity and the layer blending modes and off you go! Hope this helps.
Bahh newbie beat me too it. lol
