Terrain
Spice generally occurs along the surface and is a reddish-orange colour which distinguishes it from normal sand.
Sand is the most common type of terrain found on Arrakis.Most vehicles on Dune are specially designed to travel upon this terrain. Sand Worms are a danger when travelling across sand areas.
Extensive sand dunes are formed by the constant sandstorms. They are difficult to traverse, especially for ground based units.
Rock formations are the only terrain features that provide acceptable building sites. Sand Worms avoid and will not cross rock formations.
The rugged mountains are formed by layers of rock and give the otherwise flat planet surface its only notable elevations. Mountains are impassable to all vehicles but may be crossed by infantry units