Riot Games + Polycount forum are hosting a League of Legends art contest ( http://www.polycount.com/riotcontest2014/ )
There are several categories that you can apply; Character and environment art, illustration, VFX and more.
To be eligible (among other things), you must maintain a tread posting all of your WIPs, ideas and stuff related to your entry. I've never seen such rule before, usually you just submit your final entry and that's it.
I'm encouraging everyone to enter, not for the prizes alone, but for the experience :)
There are many talented people here and I'm hoping to see you there too! If you do, please comment and leave your tread's link below ;)
I'll leave mine when i have something to show :P
Good luck and happy learning!