It's really helpful in taking you through a place and giving you a tour:
|GI Joe, Larry Hama|
Covering multiple scenes that take place in different rooms anyway:
|Mockingbird, Kate Niemczyk|
Economically taking you through a character's routine in a minimal number of panels (without the cutout, this would have taken more space):
|Promethea, JH Williams III|
Just flat-out giving a sense of place:
|Seconds, Bryan Lee O'Malley|
Effectively acting as a progression of scenes on its own, with a payoff at the end:
|Spidey Sundays, Marcos Martin|
Or simply looking pretty:
|The Spirit, Will Eisner (colors I believe by Arlen Schumer)|
It's one of those things that actually takes up less space than if you were to not do it, but I think it isn't done as much because it does take some thought to make it work. For one thing, you'd have to make sure you'd need a reason to go from room to room. But also, it can make mundane scenes look more exciting.
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