Here we'll show you how to create a single 'tile' for a repeating pattern; then you can fill as big or as small an area as you like with it...
- Download the example PSD here.
01. Create a document for the tile
Pick how thick you want each stripe to be; the only rule is that whatever you number you pick has to be divisible by three. Now you need to do some maths.
On a calculator, divide 8 by 3 (you should get 2.66666667 or similar), then multiply this by whatever number you've picked for the thickness of the stripe and create a Photoshop document with this figure as the dimension of each edge.
So for a 90px stripe, you'd create a document 240x240px. (Bonus tip: you can do maths in a Mac's Spotlight search field. Click the magnifying glass in the menu bar and then enter, in this example, '90*(8/3)' and you'll get the answer 240.)
02. Draw the first stripe
Drag a guide from the ruler (cmd+R if it's not showing) and let it snap to each edge of the document (check your options in 'View > Snap To' if they don't click to edges as if magnetically).
Fill the background with yellow and then select the line tool. Make sure your foreground colour is black, enter the thickness of your stripe into the Weight field at the top of the screen (90px in our example) and draw a line from one corner to the other.
03. Create the other stripes
Duplicate your stripe layer (an easy way to do this is to drag it to the new layer icon – a piece of paper with an upturned corner – at the bottom of the layer palette) then hit cmd+T to enter Free Transform mode.
Note that a crosshair icon appears in the middle of the layer; drag the duplicated stripe (important: not by grabbing the crosshair) so that this crosshair snaps to the top left corner of the document.
Hit Return to confirm the move. Duplicate the stripe again and drag this one to the bottom right in the same way. (Save this now as a .psd if you think you might want to change it later.)
04. Define the stripes as a pattern
Go to the Edit menu and pick Define Pattern. Give it a name and click OK.
05. Use your stripes
Select an area you want to fill with stripes and then pick Fill... from the Edit menu. From the Use menu, pick Pattern and select the warning stripe pattern you just created. Click OK.
06. Going further
You're done! We've also added a soft gradient on our example. Of course, you can do anything you like to the stripes – distress them, apply bump maps, or anything else!
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