Hey everyone,
I'm about to embark on an overmp asset set, which will be on a square grid. I'm going to make the visuals fairly grid-like and representative(think mario 3/advance wars/to a lesser extent how the approach level topography in mario 3d world) but I'd still like to see about ways to "edge" and "round" masses to give it a slightly less boxy look. I's also like to avoid a crap ton of custom squares.

Any leads?

P.S. Thematically, this will be a vast, underground cave/cavern.