[quote="qxface":15f2z77c]What if you're using character animations that should make the hit-box a different shape? Like a taller, thinner character that needs to lean forward while jumping. Or maybe the character's arms swing outside the hit-box while walking.[/quote:15f2z77c]
Well, you just have to be careful about how your sprites. If you want something that's pixel-perfect for your character, it's probably not going to happen unless your character is a square. As a general rule of thumb I make an "average" of the body and head, and just ignore anything that pokes out beyond that. I don't think armsor legs or guns and such in games look all that odd poking through walls... it happens all the time. When it starts looking weird is when heads and bodies start poking through the walls.
[quote="qxface":15f2z77c]so you don't have to worry about rubber banding off of walls or hanging off a ledge by your nose.[/quote:15f2z77c]
Hehe, that hanging by your nose thing always bugs me in games