Alfa love the tree beard

Bravo I've always been curious how these are accomplished. I mean I could fart around figure it out and know it's a lot of masking and multiply layers but anyone know of an online tut resource?

Charlie One mask. Thats all it needs.

Delta A mediocre idea sensationalized, now it plagues every design blog on earth...

Echo There's also an easy app for quick masks like this. Enlightn

Foxtrot Over hipster used