Begin by launching the Server Launcher.
If you want to start creating a world from scratch you can start a server with a completely new world by clicking the Create New World button.
When creating a new world you are presented with three options to choose the world type from:
- Generate a Random World
Worlds in Minecraft are generated through a procedural formula that takes a random number as a starting point (rumored to be the internal CPU time) - a seed, and it will be used to generate all the terrain. The standard overworld encompasses the level ceiling down to bedrock and extending in every direction on the horizontal plane. It is generated through a secret process which creates multiple noise maps to create differing elevations, general chunk shapes, and complex mountain and cave systems.
- Generate a world from a Seed
Using a specific seed generates exactly the same world each time, and thus interesting Minecraft worlds could be shared between players. The spawn is not on exactly the same spot, though, so it is wise to give coordinates instead of directions. The seed input is converted into an integer, so, for instance, the word 'Glacier' corresponds to a value of 1772835215, which generates exactly the same world when entered as a seed value.
The algorithms in version 1.6.4 are different for world generation in those featured in 1.7.10. - please note that seeds will not produce the same world between these two versions.
- Generate a Completely Flat World
Superflat is a world type replacing the normal varied terrain of the overworld with customizable layers. On a classic superflat world, the terrain consists of one layer of bedrock, two layers of dirt, and one layer of grass; the surface of the world is completely flat with the exception of NPC villages and terrain features, if they are enabled. Since the height limit (256) is unchanged, there is then slightly less than one-third more vertical height available to build above-ground structures as compared to a normal world. Flat worlds are often useful for experimentation and can make for an easily customizable environment.
- Generate Structures
By enabling, automatic structure creation, such as NPC Villages, Strongholds, Mineshafts and Temples can automatically appear within the generated world. If toggled back on while in-game from the , structures can be created as new portions of the world are generated.
- Create Animals
By enabling, you can determine if passive animals will spawn in the world or not - this feature can be toggled on and off immediatly in-game.
Connect to your server
Once your server has started, you will see the details about your specific world. Be sure to write down the ip address of the server so that others may connect with you. If you need to modify any of the player or world properties, you can do that from the server window or in-game with the teacher menu.
By pressing the World Information button, you can set some final settings for your world, such as the Message of the Day, and Welcome Message for users as they connect. This screen also tells you some basic information about your world.
If you selected new random world, you may be in for a surprise, or it might just be perfect. Remember to note the seed of a world that you generate that may be useful to use later, or with other classes.