1. I am using this image of the earth for this tutorial. You could use this technique on any image. You can download the .psd file for this image (click here) or you can download the .jpg format (click here). After opening the image in Photoshop, fill it in with the colour of your choice. Now for the pattern you need create a new document (transparent background).
2. Select the Pencil Tool. Using this, make a small 2x2 pixel box. I suggest you zoom in (x1600) for the perfect pixel picture.
Now select the Rectangular Marquee Tool. Select the box plus 1 pixel on the right and 1 on the bottom. It should look like the picture on the left.
3. Click on Edit > Define Pattern, name it and save it.
Next,
create a new layer.
Click on Edit > Fill.
Use Pattern (select the pattern you made earlier)
Change Mode to Normal, change Opacity to 100%, and click OK. Delete the original blue world and you should have something that looks like the image on the left.
4. The resultant on the left is made using the same image and technique. The only the different is that we customized...try it out ;)
