It's nice, but nope
, ethically (and legally I might add (been there, done that in regard to my art trying to be hijacked), as all art is automatically
protected under an artist's intellectual property rights), even if credited
, you cannot ever
use another artist's work without their express permission
to do so. If permission is granted, it is then up to said artist if they would like credit to be given to them or not.
Otherwise, it's pirating and plagiarizing of another artist's work. No wiggle room, mind you: Case closed.