Step 1: Get a Good Picture
Step 2: Open the Picture
Step 3: Offsetting the Image
1. Go to the "Image" drop-down, and click "Canvas Size". From there, make both of the drop-downs show "percent", and then change the percent to 50. Then, change the drop-downs back to "pixels" and remember the numbers.
2. Go to the "Image" drop-down, and click "Canvas Size". Calculate half of the canvas sizes, and remember the numbers.
Our bacon image is to be offset 190 x 127 pixels.
To offset, go to "Filter", "Other", "Offset..."
Make sure you select "Wrap Around"
P.S. Sometimes, if you have been working on the picture beforehand, make sure to crop the image, and select to delete the cropped out part. This gets rid of any unwanted offsetting.
Step 4: Fix Borders
There are many ways to fix the borders, but using all of the techniques will have the desired effect.
-Use the Clone Stamp Tool (S)
The Clone Stamp Tool will be used to copy the parts of the picture that are totally different. In the bacon picture, I used it to make the skinny white part be connected through the border.
-Use the Healing Brush Tool (J)
The Healing Brush Tool will help to fix all of the slight discolorations between the "borders" of the picture. In the bacon picture, I used it to make the colors of the red parts be flawless looking.
Step 5: Afterwards
Save Your File
Right-click your desktop, select "Properties", go to display, and then "Browse". Select the file, and then select "Tile". Of course, then "Apply"