Puzzle Effect

1. Download one of these patterns (1 - 2).

2. Open it in Photoshop and Define it as a Pattern. (>Edit>Define Pattern).

3. Open the image you want to turn into a Puzzle.

4. Create a new Layer and Fill it with the Puzzle Pattern you have created in Step 2.

5. Resize (CTRL+T) the Puzzle pieces to fit your document.