a_mod

Several new biomes are added to the overworld, including the Redwood Forest, based on the northern California forests with very tall trees, and the Rubber Forest, where trees hold rubber logs that can be crafted into planks and then into rubber for erasers and wheels. The Nether Infestation biome has netherrack ground and extra gold, with water that boils at a lower point and a sky that glows orange. The Xtreme Hills biome consists of hills that cover much of the area.

The mod also adds dimensions reached through portals built like the Nether portal. The Moon dimension is lit by a moon portal igniter and frame stone, and holds space colonies, villages, alien temples, UFOs, shipwrecks, strongholds and caves with special moon ores. The Dead Dimension is built from a Skull Ra frame and Dead Planks and holds large deadlands that can invade the overworld. Cheese content appears throughout the world, with cheese obelisks, caves and a cheesy cookie that is inedible.