Textures That Tile
Photoshop CS6 Tutorial
How to Create Seamless Textures That Tile in Photoshop
If you photograph a texture like a block wall or cement walk and there will be a seam as you display side-by-side copies of your original image.
To make the tiles seamless, it requires a few steps in Photoshop.
Open a texture image in Photoshop (File > Open).
Select the Crop tool. Use the pull-down menu in the tool options to set the Width and Height to 512 pixels. Enter 72 pixels/inch (ppi) for Resolution.
Click-drag the crop rectangle to position the crop area, then press Enter.
From the Filter menu choose Other > Offset.
In the dialog box choose Wrap Around for Undefined Areas and set the Vertical and Horizontal sliders to 256, then click OK.
You may notice some obvious lines in the center. Remove the "wrap" lines with the Clone Stamp tool (s key). Also remove any texture imperfections that would be attention-grabbing.
To test your texture, choose Select > All (Cmd/a (PC-Ctrl/a)) and choose Edit > Define Pattern. Open a new document (File > New) 1024 pixels x 1024 pixels at 72 ppi.
Select Edit > Fill and choose Use: Pattern. Select your pattern from the Custom Pattern swatches.
Clone Tool Instructions
For information on using the Clone Stamp tool in Step Six, see topic, Repairing With the Clone Tool.