<3 Hmm... I'm surprised it is liked
What filters.............
Well I relied heavily on layers and blending modes, and occasional effects like extrude, radial blur, polar coordinates, and some of the artistic effects [not sure which ones, I check out their look, and if it looks good make a copy of that look, and maybe try blending it or cutting it out, masking or editing it somehow.]
Needless to say, there were well over 100+ layers by the end xD And several different pictures appeared during the process, though this was the one I chose to try to put together and present.
To summarize, the picture came about completely randomly, without basically any drawing on my part, just keep trying things until it starts to take shape... And when something starts to take shape, you do your best to help it grow...
It's kind of fun doing art this way, because you never know what you'll end up with!
Here's an older example of something I did in a similar style :
http://lexarvantalis.deviantart.com/gallery/#/d2akk4z