In selecting the image size does the tiling automatically divide the image into the divisable equal tiles? Does the tiles receive a grid number or is that somethiing i must assign? My project is a 15ft diameter of the earth. I am using 16x16 in. black granite tiles. there are sections that will be just black. I am trying to understand the correct steps to divide the image up .I will tr yourr steps. I have a site where you can see what i do. will be in touch and let you know how its going.