Tellus

Tellus converts open geographic datasets into terrain chunks as they are explored. Elevation is sampled at roughly 30 meters across the globe, with finer coverage where regional data exists. Biomes are placed to follow real-world climate zones, and cities, buildings and roads are generated from map data. A teleport interface in the game lets a player choose a real location to travel to.

The mod is built on Gegy's Terrarium and partly based on its code. Terrain scale, height limits and other parameters are set in the Customize World Generation screen when a Tellus world is created, and a preview screen shows the result before the world is made. Optional real-time weather and time systems follow the climate of the chosen location.

Tellus requires an active internet connection because it streams land cover, climate and weather datasets as needed, so data use grows with the area explored. Survival play is limited, since some features and biomes are still missing and future updates may break existing survival worlds. Server support is not official yet: a world is created in singleplayer with Tellus installed, then moved to a server so new chunks generate with it. Installing the mod on the server is required, and clients do not need it. The license is custom and the mod is not open source, though its source code is public.