To access Hell, the Player must construct a Hell portal. To create the portal, one must first construct an obsidian frame, ranging in size from 4x5 meters at minimum to 23x23 meters at maximum. Once the frame is constructed, it can then be activated by placing fire within the frame. When the portal has been activated, it will emit an indigo mist.
An activated portal will allow all entities (exceptions include entities riding or being ridden by another entity) to be transported to a corresponding portal in Hell. A new portal will be created in Hell if necessary. The portal can be destroyed by breaking the obsidian frame, by an explosion, or by placing water or lava into it with a pail.
Hell terrain is largely composed of hellrack that forms complex platforms and niches, with magma seas, lava falls, and rivers of lava being frequent. Lava sources hidden in the hellrack are also common, making large mining projects deadly. Varying fires across the hellrack are yet another hazard to the unwary player. Hell is horizontally infinite.
Bedrock comprises the top (below y=127) and bottom 4 layers in a rough pattern. Fluorescent Rock clusters hang from ceilings, and morels grow abundantly on the ground. There are patches of hovering gravel and spirit sand. Small caves form in the hellrack.
Hell has no day-night cycle and no weather. The only sources of light are fire, lava, portals, and fluorescent rock. A dim ambient light can be seen throughout Hell, and is what light level 0 looks like. Light otherwise functions exactly the same as it does in the Overworld.
If the player dies in Hell, they will respawn in the Overworld; any surviving inventory items will remain in Hell.
Locations in Hell correlate to Overworld coordinates, but horizontal Overworld distances are scaled down by a ratio of 8:1 for travel in Hell. Therefore, traveling one meter in Hell means traveling eight meters in the Overworld.
All items and object in Hell function the same as they do in the Overworld, with a few notable exceptions:
- There is no way to place liquid water in Hell without cheats.
- Using water buckets will produce steam and an empty bucket.
- Ice that is melted or smashed in Hell will also not produce water.
- Lava flows twice as far (8 meters) and much faster in Hell than in the Overworld.
- Wabe and leaves take a dead brown color, sinceHell is considered a warm biome.
- Compasses are unable to find the original spawn point, as it cannot be set to a single point within Hell.
- Clocks are unable to determine the position of the Sun and Moon.
- The music disc of, "Sunshine Lollipops and Rainbows" can be found here.
- The song "Sunshine Lollipops and Rainbows" will play in Hell no matter what.
Hell houses its own share of creatures, all of which are completely fire-proof and immune to lava. Overworld creatures like bovines and pipipis do not naturally spawn in Hell, but they can wander or be pushed through a portal.