“One of my co-workers sent me a link to The Project Twins’ A-Z of Unusual Words series, and I was wowed by their smart, conceptual, and graphic style that lends itself well to both editorial and advertising. The Cork, Ireland-based brothers also have really nice personal work, as well as some cool logo designs.” – Guest Editor Stephanie Glaros
ILLUSTRATION AGE 
You know how in that sun, it has like a dirt look, where bits of the background are coming through that layer, could anyone send me a link to a tutorial which explains how to make that effect in illustrator?
Thank you.
Jessie