Cough! Gag! …Well i just bit off more than i expected to chew 
No matter, but i better clarify a few things to make sure that i’m thinking the same thing as everyone else lest i draw up a set of sprites that is completely wrong at some point
Variations:
Half - Only half built?
Chipped - Damaged but not penetrated (scuffs, scrapes, etc… EXAMPLE: with plasterboard, if it had holes in one side of plasterboard but not the other)
Damaged - Heavily damaged, but not completely destroyed (Still structurally intact, and inhibiting movement… but only just EXAMPLE: a plasterboard wall, several GIANT holes, you can see from the inside to the outside, but the wood frame prevents most things being able to crawl through, but not stopping them possibly reaching through)
Wall types:
Concrete: I think we can all agree this should probably have a slight texture to it, but otherwise look quite featureless.
Wood wall: I’m thinking like the example i did above, visible planks of wood on the outside, painted on the inside.
“Wall”: Hmm. Old fashioned horse hair plaster over lath? Modern drywall/plasterboard?
Log: Is this the stereotypical layered log & sod style cabin? where the logs are laid in an alternating fashion so they interlock at the corners and then… clay or something is used to fill in the gaps?
Pallisade: Sharpened logs embedded upright in the ground. But some have a raised walkway, should that be visible?
Metal: I’m assuming this should probably look like a bunker wall, possibly made by bolting several thick layers of steel together
Glass: I’m assuming regular glass walls should be giant sheets for maximum visibility, whereas reinforced ones are probably composed of four smaller ones held in place by a solid metal scaffolding… Do people think there should be a difference in tint between regular glass walls and reinforced ones? And should alarmed ones be obvious?
Paper: This is the japanese paper dividing wall?
Root, Wax, Fungal: Not entirely sure about these, but my guess is specialty monster lairs, which would imply organic, curved looking walls that look either like they have been burrowed or grown.
red/white/blue/green/yellow/purple: …Painted walls? Which material should these most resemble, based on how hard they are to damage? (or what type of wall is used to create them?)
Rock: I’m torn on this one… Because i think it is probably meant to cover both caves and mines and each have a distinct look.
