Show us what you can make using one of the tetrominoic canvases shown below; you can flip/rotate however you want (just as long as you just stick to 90° angles, of course). Full list of canvases in the forum.
Canvas Size - Use one of these canvases (remember, you can flip/rotate):
Colours - Max 20.
Transparency - Required. However, the transparency must only be used outside of your chosen shape.
Animation - Optional.
The challenge thread will have all the challenge updates. The thread is also a great place to post your WIPs.
This time the choice will be very difficult, lot of very good things.
the square would be 100x100 right? we could just substitute what with any piece :P
Someone do this!!
Throw in the other two tetris pieces in the mix and then make a tetris game with all the entries. :)
This is a really cool idea. I never noticed it in the challenge thread in the mod forums :0 I think I might enter.
Hm, maybe someone could make a Tetris game out of all the challenge entries. Kind of makes me feel bad for not allowing any rectangluar tetrominoes. Oh well, rectangular canvases are sooo passé.
I think I'll do a tetris game 
@r1k: Hexcollab? That'd be interesting, be cool to see someone do that afterwards anyway :)
pretty wierd but cool challange. Would be cool if some people collaborated a bit so their peices fit together kind of like those hexagon callab things they do at pixelation (forget what theyre called).
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There has been some seriously impressive entries. Going to be an extremely hard vote!