Overworld
The Overworld is the dimension in which all players begin their Minecraft world. It is the dimension with the most biomes, blocks, and mobs, and is where most players spend the majority of their time.
Creation
The Overworld is the only dimension created when the player creates a new world. The other dimensions (The Nether and The End) aren't created until a player enters the corresponding dimension for the first time.
Daylight cycle
The Overworld is the only dimension with a daylight cycle and the only one where the environment reflects the passage of time. In contrast to time zones in the real world, Overworld time is universal; it is always the same time for every player in the dimension regardless of how far apart they might be, even in an "infinite" world. During the daytime, the sun acts as a powerful light source, with a light level of 15, the maximum. Sunlight is strong enough to grow plants and affect the way mobs spawn, among other interesting effects. During the nighttime, the moon is the only natural light source. However, moonlight is comparatively dim; the light level falls to a minimum of 4, allowing hostile mobs to spawn. Other than during thunderstorms, nighttime is the only time players may sleep in a bed. The daylight cycle can effectively be measured using a clock, which allows players to determine the approximate Minecraft time anywhere in the Overworld. Time can also be changed or stopped with the use of the /time command. The sun rises in the east and sets in the west, just as it does in the real world. Observing its motion is a simple method of telling direction without a compass.
Naturally created Blocks
Naturally created means a combination of events that cause a new block to be placed by natural causes, not the player. Some of these blocks may also be created as part of world generation.
Air
Small Amethyst Bud
Medium Amethyst Bud
Large Amethyst Bud
Amethyst Cluster
Grass Block
Dirt
Mycelium
Water
Red Mushroom
Brown Mushroom
Kelp
Kelp Plant
Cave Vines
Cave Vines Plant
Pointed Dripstone
Cobblestone
Stone
Obsidian
Fire
Snow
Ice
Cactus
Sugar Cane
Vines
Seeds
A new world in Minecraft is generated through the use of a randomly generated seed, which is an integer used as a starting point for the world generation formula. The player can specify a seed or allow the game to generate one randomly. If given a non-integer input (such as the word "Glacier"), the game converts it into a corresponding integer (such as 1772835215). A given seed generates almost exactly the same world every time, provided the same edition, game version, and world type are used. Although the exact spawn point varies, the coordinates of all terrain features are the same. All seeds within the 32-bit integer limit in Java and Bedrock editions may also generate worlds with the same terrain shape and biome map, but the placement of terrain features, structures, and carver caves may differ.
