Scenes and Roots

Dreamlab has a scene hierarchy like most other game engines. However, it's divided into four "root" trees:

Root	Description
world	Entities and Behavior scripts under the world tree will be synced to all clients. Their positions, rotations, etc. all automatically sync.
local	Only spawn on each player's client. The main Camera lives here and is also a good place to put HUD or other client-only components
server	Behaviors and Scripts only spawn and tick on the server. Useful for game state managers you only need to spawn once over the lifetime of the entire game.
prefabs	These entities are disabled at runtime but can be copied into other world roots via cloneInto in scripts or can be copy-pasted using the editor. Useful for reusable objects.

For example, consider the following scene:

In this example, Sprite would exist on all clients. Camera only exists on each client. GameManager is only spawned once and on the server. Player is a prefab that we can copy into the world tree when we need to spawn a player.