Basic Mines Set - TrueTiles compatible

Terrain tiles for 1.25" grid, TrueTile compatible format. I've kept the tracks separate from the terrain, making the layout more flexible at the expense of being more finicky.

Terrain is from https://www.thingiverse.com/thing:1757462

Wood planks used for railroad ties and cart stop is from https://www.thingiverse.com/thing:3401685