I found an old oak shelf in a thrift store for $4. I really liked the trim but the backing of the shelves was made of some cheesy paneling. I decided to make a mosaic of matboard tiles embossed with my Sizzix Textured Impression folders to back it with. 

• Gather matboard scraps in coordinating colors. 
• Cut a stack of of 2 1/2″squares.
• Emboss each square by running through Big Shot die cut machine using Sizzix Textured Impression folders (I used folders that I designed :-)). Distress each square using a blending tool and brown ink, shading the edges darker and leaving the middle light.  

• Cut matboard backing boards to fit each of the three shelves. Distress them with brown ink. 
• Line up squares in alternating rows, staggering the positioning. Cut where needed to continue pattern from shelf to shelf.

• Use an ATG gun to adhere squares to backing board. Start with the middle row and work out to the sides. I added some thin matboard strips to each side to fill in extra space on the sides.
• Adhere mosaic panels to the back of the shelf using ATG gun.