Polkadot pattern from Background Labs (backgroundlabs.com), and concrete texture from texturelib.com.
[I should add - the fact that a lot of the shapes were handdrawn and not perfectly uniform was done on purpose, to give a little of the flaws one sees in the built environment]
Huh - I didn't choose a vintage illustrated ad (I hadn't realised we were meant to, for some reason), but here goes!
Finally, the linework is done. Phew. Oh, and did I mention pretty much all of it was free-drawn, using the pen tool.
Well, I've chosen my ad (check my cover photo)! It's a very recent one, but I figured, while not too hectic, it wasn't too simple, either. And it should give me some great practice at getting my elements right.
Also, I love the homage to platformer games, and I'm certainly a sneaker fan (although this brand is new to me) :)