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Now it's time to make the interlace TV lines, the alternating horizontal lines that identify a television as being a hooky device from the past as it turns out. Anyway notice right here inside the Layers palette, there is a layer called Orig Line that's the original line upon which we are going to base our interlacing lines. I want you to press the Alt key or the Option key on the Mac and click the Eyeball in front of this layer so that we are seeing only this layer and nothing else inside the composition.
Then I want you to zoom into this image, quite a bit actually you want to zoom pretty far in. So that we can see this 3 pixel tall line as it turns out, go ahead and get your rectangular marquee tool here. And then start dragging right at the top of the line like this and notice it's 1, 2, 3 pixels tall. So I want you to move your cursor 1, 2, 3 more pixels down so that you get 3 pixels worth of green line and 3 pixels worth of transparency that checkerboard pattern by the way indicates the transparent portion of the layer.
Now don't worry about the fact that I haven't and you don't need to either, I haven't selected the entire width of the line. It's only important that you get just a little bit of it, any width will do as it turns out. The height is the more important element. So as I say you want to make sure that you select all the line height wise and 3 pixels below it and just to confirm that your Selection Outline is exactly 6 pixels tall, I would like you to bring up the Info Palette. And for me I am going to click on this little (i) icon here on the right side of my screen, you could also choose the Info Command from the Window menu or press the F8 key.
And then notice you will see a W and H value, the W value being the width of your selection, you don't care about that as it turns out and height value being the height of the selection, and that should be 6 pixels that's very important. Alright so once you have gotten the selection outline the right size, go ahead and press the F8 key in order to hide the Info Palette. Then I am going to go up to the Edit menu and I am going to choose this command right here Define Pattern which will define the selection as a repeating pattern. And I will call this pattern interlacing and click OK in order to accept it.
Now then let's go ahead and zoom back out or zoom way too far in for this next step as it turns out. Where are we inside this image? Oh it's so easy to get confused. Now then let's go back to the Layers Palette, bring it back up on screen and press the Alter Option key and click on that eyeball again. That's the simplest way to make that line disappear on screen and to make the other items come back on screen then this is very important. Press Ctrl+D or Command+D on the Mac in order to deselect that little tiny selection that you had going there inside of the image.
Now I want you to click on Uber group, on the Uber group, group that you have made Uber group folder and I want you to go down to the black white icon at the bottom of the palette which allows you to choose adjustment layers as well as dynamic fill layers like pattern. Go ahead and choose the pattern layer in this case and I want you to make sure that you have the proper pattern selected. It should go ahead in default to the last pattern you just created but if not go ahead and click on this down pointing arrow head and then click on this guy right here interlacing which will show you that it's something by 6 pixels RGB mode and it's okay to go ahead and scale it to 100% that's actually really good.
Then click OK in order to create those new lines. Finally I recommend you go ahead and throw away this layer mask. It's just cluttering up the palette my pressing the Alt key or the Option key on the Mac and clicking on the trashcan icon. Now let's go ahead and name this layer Interlacing just for the sake of consistency here and then I am going to change the blend mode that's assigned to this interlacing effect to overlay, a good old friend overlay here so click on Normal and choose Overlay from the Blend Mode Pop-Up menu like this and we end up getting this wonderful television effect.
Could that not be more TV like? I don't think so. In our next exercise we are going to add the little zipper text across the bottom of the screen and we will start to get a taste for layercomps inside Photoshop.
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