Added modular stairs.

Also debuting the new tile feature system. When the base tile is locked in place you can set one of the feature pieces into the center. Current options are a ladder, climbable stated ladder, and a sign. Rising water added as a test. It is likely impractical to actually use.

Fixed workshop preview image.

All colliders updated to improve performance and to prepare for the next big update.
Stay tuned.

Tweaked the layout slightly so tiles would be easier to find.

Massive update. I've added in building walls, doors, windows, and modular bases for minis.
I also corrected a rounding error that produced a small gap between tiles.

Enjoy.

Initial upload.