100% Inkscape, not 100% Vector
No, really: it's an image converted to a pattern, and then mapped to some crazy-ass vector shapes.
I discovered this trick while being pissed that I couldn't crop an image in Inkscape; turns out that you can do way more than that.
Lessee... Imagination, schoolwork, cooperation, environment, love everything, and... Yeah, no clue about the last two. I love the idea of visual resolutions! This has a really nice overall look, too. I can see it as being something that could go horribly, horribly wrong, but you brought it all out well. Is that actually some of your homework?