Phew. That background took about 18 hours of work to trace. But here it is: Twilight's underground laboratory from Feeling Pinkie Keen. For all your scientific needs.
IMPORTANT! This background is supposed to look like this: sta.sh/0dpq1q34xt4 As you can see, there is some stuff in front of everything that is supposed to cover characters etc. If you want to achieve the same result but don't know how to work with vectors, then try putting this in a separate layer: sta.sh/0157ofglm2a0(Not useful for MS Paint fans, sorry. )
No, when you make a vector by tracing (i.e. directly drawing over) something you found online, then it's just a resource. It's only art when you make a vector without tracing it from something someone else made.
Hah, I must say that your comic was a pleasant surprise; usually comics using pre-made vectors aren't very good, but yours was pretty neat. I was particularly surprised by AJ using that hole in the background as doors, mostly because I'm not sure if it was originally supposed to be used like that. (They're in the basement, after all.) But no matter, it was still pretty clever!
I'm glad to see that you found my SVG file this useful. Thank you very much.
Thanks for the kind words! Hopefully I can improve it even more as I do them -- there are still lots of things I want to fix but I'm sorta trying to work the fixes in to the story. Anyway, the comic afterward is a continuation and made use of this background again. [link] So thanks again!
Enter at your own peril past the vaulted door where impossible things may happen that Equestria's never seen before: In Twilight's Laboratory! She's the smartest mare you've ever seen, but Pinkie blows her experiments to smithereens That is the gloom and doom while things go boom IN TWILIGHT'S LAAAAAAAB!