I recently bought TerraTiles from RAINN Studios. They are a modular wargame terrain system. They come with 1" risers for the tiles so you can make hills and elevation for your games. The tiles include rivers and roads, which look a little odd going up elevation without some visual attachment. So I created this thing so I can make rapids for the rivers, and ramps for the roads. Size and shape of the stones, as well as the size and aspect ratio of the base are customizable. Take note that TerraTile risers are 1" tall, and the roads in that system vary from 1.7 to 2.0 inches wide.Measurements are in millimeters. The height is set to one inch (25.4 mm) by default. If using this offline, you can set measurements using the variables inch and inches (e.g. path_width=1.8*inches;).