The Rasterbator is a cool program I stumbled upon. Rasterization is the process of converting a vertex representation to a pixel representation, or in other words converting polygons likes squares and angled shapes into pixels like making a larger picture out of individual dots. With this program you can take images and blow them up massively to create murals or large poster size images and the scale is by the pages down and across or tile size they have a lot of cool examples on the website.
http://homokaasu.org/rasterbator/
