Version 2!

Updated:
Most walls to be exactly 2 grids high, so they match stairs and blank blocks

This mod does NOT replace existing models, so will have to redownload a bunch of stuff so it won't break existing maps made with this mod.

Added larger based liquid tiles, in 2x2 and 3x3.

Fixed a missing polygon on the secret door wall piece.

Uploaded wrong mod. Should be fixed now.

Added caverns!
Walls
Floors
And cavern to dungeon joining piece (more of those to come)

Added:
Bags of bits by category. No new tiles.

Added:
Walls without floors (most types)
A flat-topped door (sits flush with walls) opened and closed
Pillar bottoms (and top, if you flip it)
A fountain
Wall with shackles, and a skeleton
Wall with a burial alcove

Added:
Spiral wooden staircase 2x2x2
2x1 wooden staircase
Ladder
Wooden trapdoor open/close
A flaming brazier
Double door in iron