This picture is a prototype of a poster I am in the process of creating. I have used color inverted copies of pictures I have taken of my Spirit Rocks to form this checkerboard pattern which is visually pleasing. I have stretched some of the .jpg files to fit the Square as I saw fit. Many of you who have used Photoshop can spot the filters I have employed to create the background effects. The poster I hope to create will be approx. 18"X24" . If i comes out according to spec. I will have a glow rock instead of an inverted color rock image which will not be modified in the final product. I will probably have six squares across and down instead of the four you see here.This stuff is fun.