This has been making its rounds on the web, but I just couldn't resist posting it too. It should not be missed. I've plenty talked about how much I love constraints, as they tend to be a great catalyst for ideas you might not have ever considered and this illustration project completely embraces that notion.

Thomas Lamadieu has been drawing in the space between buildings for his new series, SkyArt, and he's making us all look up again. Open spaces of blue sky replaced with drawn characters stuffed amongst the architecture. What's not to love?

Holy crap, I just spent too much time on Mason's flickr site. I got lost in the randomness of his doodles and how they seem to land on any damn thing he comes across. His drawings are loose and unpretentious, free to roam, with layers of goofiness but end in an almost perfect layout and composition.

Mason, let's go have a beer, and then draw me something to hang on my wall.

Our first R-Rated wallpaper comes to us from Spaniard illustrator Amaia Arrazola. If you recall she was also our guest blogger for the month of February and killed it with 9 inspiring posts (read them here).

If you're inclined to wrap your digital life with her garden delight, then by all means download the free wallpaper.

Ken Garduno, from Los Angeles, California, is amazing at his craft. But instead of showing his final, polished pieces, we want to highlight his more rough sketches.

Sometimes you need nothing more than some black ink and a sheet of paper (and possibly Ken's hand). The line is a beautiful thing.

Long-time friend of DA, Mr. Jess Smart Smiley is making a children's book he's quite passionate about. It's not often that I post about Kickstarter type projects, but I couldn't help falling in love with his cute monsters and playful scenes. The book is titled, Rumpus on the Run, and is Kickstarter's first "look-n-find" book.

Lucky for us, Jess passed along some of his sketches from over the years. Take a look below and make sure to check out his Kickstarter page, the rewards especially, he's even offering to draw some of you right into the book ;)

I'm a longtime fan of David Shillinglaw's art. It's impossible not to be. He's got great instinct when it comes to letters, layers, shapes and colors, and wait until you see what he can do on a concrete wall.

If you've never taken a marker or paint brush to a wall, get off your butt and make it happen this weekend. You must, if simply for the challenge when it comes to size and scale. It's by far my favorite canvas and no one does it better than David.

Below are some of my favorite of his images (including a video of his process).

I want to introduce you to one of my favorite illustration projects of late. It comes to us from Israeli artist, Geffen Refaeli. The concept is incredibly simple, and the result, flawless.

What started as a personal experiment to practice drawing and doodling has turned into a daily art project with over 20,000 followers (in under a year). Every day, Geffen uploads an illustration that was inspired by a mashup of her friends photographs. She takes bits and pieces from their pictures and creates one-color, surreal drawings. She then posts the drawings on Instagram (@dailydoodlegram) with links to the photo feeds that prompted it all to begin with.

I'm a fan, and I'd gamble to say so will you be. Prints are available at her recently launched shop.