World generation
Biomes
A randomized biome in a randomly generated dimension.

Randomly generated biomes can be found in the new dimensions.

    Biomes that are discovered by the player through the changed portals are added to the list of biomes when creating a buffet world, including _generated:id biomes.
    A certain sound effect may periodically play without the presence of its normal source throughout a biome, often excessively.
        This also applies to music as well, sometimes even at different pitches as well (e.g. biomes in the dimension aide).
    Weather is disabled in some biomes.
    The biomes have randomized mob spawning.
        Mobs that do not naturally spawn in the non-random dimensions may appear, such as giants, withers, zombie horses and illusioners.
        Many generated biomes do not spawn mobs.
        Large quantities of structures and shulkers generating with end cities in a randomly generated dimension.
    The generated biomes can have random structures or structures that naturally generate in other dimensions.
    "Basalt Spikes", a random biome that bears resemblance to both the basalt deltas and ice spikes biomes in a randomly generated dimension.
    A biome filled with structures that resemble trees in a randomly generated dimension.
        Mobs that spawn with a structure may spawn in larger numbers than usual. There could be a high number of elder guardians spawning near an ocean monument or a high number of shulkers generating with an end city.
        Often, a biome contains one particular structure in great abundance.
        Sometimes, a dimension repeatedly generates letters, depends on the biome. It is highly probable that the shapes for these characters are from Minecraft's font textures.
    Some random biomes may have some resemblance to a non-random biome.
    A significant number of the random biomes have large quantities of lag inducing blocks like vines or decaying leaves or stacked seeds breaking all at once. These biomes have the very great potential of crashing the game or at least render it unplayable.

End ships found in the "between" biome.
A deposit of observers found underground in the "busy" biome.
Floating prisms of cobblestone stairs found in the "shapes" biome.

Three new pre-made biomes were added.

    Between
        Works best with Floating Islands buffet world generation.
        Generates a mesh of end ships.
        Resource location is minecraft:between.
    Biome for player with no time for nonsense
        Works best with Overworld buffet world generation.
        Generates what seems like a normal snowy taiga, although mineral blocks and redstone components generate instead of ores.
        Resource location is minecraft:busy.
    Shapes
        Works best with Floating Islands or Overworld buffet world generation.
        Generates a world consisting of different shapes made of one or more different types of blocks.
        Resource location is minecraft:shapes.

Dimensions
A randomly generated dimension made of floating islands.

There are 2,147,483,645 new dimensions, which means 2,147,483,648 (231) possible dimensions per world seed, giving 295 dimension combinations in total, roughly 40 octillion.[4]

    Certain dimensions contain easter eggs (see below).
    Certain dimensions (including easter egg dimensions) have the consistent world generation as in the Overworld within the same world seed.

Various pre-existing and randomly generated biomes appear in the dimensions.
A snowy tundra found in a randomly generated dimension.

    Some dimensions may have only one biome, while others have several.
        Even if a dimension has multiple biomes, a dimension can be dominated by a particular biome with all other biomes being exceptionally rare.
    Biomes that are rare in the Overworld or Nether can be quite common in the new dimensions.

The blocks that make up various features (e.g. ores, ice spikes, lakes) are randomly swapped.

If a non-random biome appears in a random dimension, mobs expected for that biome generally spawn.

    Usually, aside from bats, mobs that do require a particular light level to spawn do not spawn regardless of light level. For instance, in the dimension jeb__, passive mobs and slimes spawn in the savanna biome, but no other mobs.
        There are some exceptions to this. For example, hostile mobs spawn at low lights levels in the dimension interesting, along with a small percentage of other dimensions.
    There are still slime chunks, and slimes spawn in certain biomes.
        When they do spawn, they spawn below Y=40 as usual.

The sky, blocks, menu, player, etc. are randomly tinted.

The sky is from the Overworld, Nether or End.

    For Overworld skies, the sun and moon appears in random sizes and the day-night cycle has a random duration.
        In a majority of the dimensions, the sky either cycles rapidly, making a full revolution in exactly five seconds, or it is completely frozen. It is rare for the sky to move at other speeds, but when it does move at other speeds, the cycle duration is randomized.

An example of the unusual lighting in the random dimensions. White concrete was placed near the void in this randomly generated dimension.

Some dimensions have sky light, meanwhile others do not have any, even if there is a sun and moon.

    In dimensions without a day and night cycle, the skylight can operate like sunlight and prevent mob spawning, but in other dimensions, it can operate like moonlight and mobs can spawn on the surface.

The lighting in the dimensions can be unusual.

    Sometimes, the same face of every block in the dimension is completely dark (sometimes fully black).
    In some dimensions, blocks are sometimes tinted or recolored in different ways, depending on the block type, block state, or the dimension.
    In some dimensions, the lighting in the dimensions is similar to the Overworld.
        There are seven easter egg dimensions that use the exact same lighting system as the Overworld (not including Overworld-based easter egg dimensions). These are checkerboard, gallery (which uses the lighting system during the nighttime), origin, patterns, perfection, skygrid, and spiral.

Unusual blue lighting with random particle effect in a randomly generated dimension. A random particle effect fills some biomes.

    The particle effects appearing in each biome depends on the dimension. In some cases, Overworld biomes can get a particle effect.
    In some biomes in the generated dimensions, randomly generated particles can cause lag depends on the operational system.

The style of generation can be:

    Overworld-style generation with hills and valleys.
        Caves generally do not generate. Lava and water lakes may still generate when there are no other caves.
        The size of the hills and valleys depends on the biome, much like in buffet generation.
        There is bedrock at the bottom with generation identical to the Overworld.
            There may occasionally be holes in the bedrock in some of the dimensions.
            Example of holes in bedrock in a randomly generated dimension.
        A subtype of the Overworld generation is generation that is superflat, but with some differences.
        Superflat style generation in a randomly generated dimension.
            Caves may still generate.
            There can be various layers of a single type blocks. These layers have various thicknesses.
                In certain dimensions, the layers are not perfectly flat with minor hills and valleys.
            Bedrock near y=0 is not in a flat layer and instead generates in the same way as the Overworld's bedrock.
            This type of generation is quite rare.
            The superflat style generation appears to be a result of water based biomes having blocks swapped. The surface of the superflat biomes is identical to y level of the surface of the ocean.
    Nether-style generation, with a bedrock ceiling at Y-level 128 and the cave generation that is seen in the Nether.
        Objects may generate above the bedrock ceiling.
    End-style generation, with no bedrock and floating islands.
    End type generation in a randomly generated dimension.

Beds and charged respawn anchors explode in the generated dimensions.
A mineshaft carving through dried kelp in a randomly generated dimension.

    However, beds do not explode in some dimensions, where the beds can be slept in at any time of the day. They set the spawn point much like in the Overworld, but when the beds are slept in, the time is not set to the morning.
    Floating multicolored fossils in a randomly generated dimension.
        The following dimensions where beds do not explode in the generated dimensions (all but "content" are easter egg dimensions that are based on the Overworld world generation, of a total of 16 dimensions):
            "blacklight"
            "busy"
            "chess"
            "colors"
            "content"
            "darkness"
            "decay"
            "holes"
            "pillars"
            "rooms"
            "slime"
            "wall"
            "zones"
            Colored dimensions (including "red", "green" and "blue")

The ID for each dimension is determined from the SHA256 hash of the name of the dimension with the string :why_so_salty#LazyCrypto appended to it.
The dimension generated by the ID "redstone".

In end ships in the new dimensions, chests are generated with fleet_orders loot table.
The dimension generated by the ID "overworld".

In some dimensions, compasses point toward the center of the world. In others, the needle spins in random directions like in the Nether and the End.

Liquids behave differently in different dimensions. In some, the liquids act like they are in the Overworld, and in the rest, they act like they are in the Nether.

Undead mobs do not burn and piglins do not zombify in the random dimensions, even during the day.

End portals can be constructed. When entered, the player is teleported to the end, but at the coordinates at which they entered the portal on a newly generated obsidian platform.

Maps can function correctly as they do in Overworld, but usually a map just shows gray and orange static, much like in the Nether.

    Unlike the Nether, the player indicator accurately displays the player's orientation.

Clouds can appear in some dimensions in a layer at some random Y level.

There is weather.

    The current weather is identical in all dimensions. If it is raining in one random dimension, it is raining in all random dimensions and the Overworld, though it does not rain in certain biomes as mentioned above.

Dimensions solely consisting of the biome the_end with obsidian pillars at the center of the map are quite common.
This dimension is an example of an 'endless end' dimension. The image was intentionally brightened due to this dimension having dark lighting.

    When using /debugdim in this type of dimensions, no biomes are listed.

The music is identical to the Overworld's.

Some dimensions may have fog that makes it difficult to see far distances.

The lighting system between buffet worlds and unique dimensions is different. In the Overworld there can be darkness, while in the easter egg generated dimension there can not be (i.e. "fleet" (minecraft:between) and "shapes" (minecraft:shapes)). 