Not exactly a hard alt, even though it isn't all that good, it was fun to make:
I had the idea you could walk about inside it, even walk about on the walls to give you more room to walk about
(Link: http://img89.imageshack.us/my.php?im...ompleteqj9.png)
(Link: http://img236.imageshack.us/my.php?i...ompletern0.png)
I was going to make an animation of my habbo walking in and about in the cube, but sadly my animation program decided to naff up on me, if it ever decides to work again, and I still care for this alt enough to finish it, I will.