Non-varied floor tiles will display properly now.

Increased background transparency of constructed floor tiles.

v1.31 - 2015-06-04OK. I've discovered what the problems were. To get non-varied floor tiles to work, I had to include a separate set of overrides in case all of the floor tiles are changed to 46 (a period). I pondered several ways to do this and in the end I had to make non-varied floor look exactly like varied floor to prevent any conflicts. If you want all of your grass to look the same, I'm afraid you'll have to edit the tileset images. :/As for the sneaking, that was a problem with the constructed floor transparency. In order to keep floor engravings from looking too busy, I filled in most of the tile with black. I've tweaked the floor tiles and found a nice balance between good-looking engravings and visible sneaking cones.