Q: How does tiberium grow?

A: Nodes are placed throughout the world, similar to oil. Each node gets a growth cycle, during which it places Tiberium Ore on tiles around it, within a given radius, ensuring that it only grows onto a new tile if there is tib on the tile immediately closer to the node. Growth Credits making it do the placing of ore on tiles more, and greater distance from spawn increases how much ore is placed.