On the main menu, hit Challenge levels:



Then Level editor:



You should see the main editor interface:



There are three tabs:

• Map - commands to open, duplicate, create, save, and publish maps
  
• Entity - commands to create, manipulate, and delete entities
  
• Voxel - commands and settings for voxel editing

Hit New to create a new map, or open an existing one and hit Clone map.

If you have god mode activated and you want to edit the campaign levels, it's recommended to clone them first, otherwise the campaign will become corrupted. If this happens, you can always restore the game files.

To play a map, hit Run. Make sure it has an active PlayerSpawn first!

Controls are similar to Blender[www.blender.org].

[Right-click] -------------------------------------------- Select entity
[Shift] ---------------------------------------------------- Hold to select multiple entities
[Alt+Mousewheel] ------------------------------------ Zoom in and out

While holding [Mousewheel] or [Capslock]:

[W] [A] [S] [D] ------------------------------------------ Move along X / Z plane
[Ctrl] / [Space] ----------------------------------------- Move along Y axis
[Mouse movement] ---------------------------------- Rotate view
[Shift] ---------------------------------------------------- Hold to increase movement speed

With no entities selected, hit [Space] to open the Add menu:



Type an entity name and hit [Enter] to spawn it.

Hit [G] to "grab" the entity and move it. [Left-click] to apply the movement, or [right-click] to cancel it. While moving, hit [X], [Y], or [Z] to axis-align the movement.

Similar commands:

[R] ---------------------------------------- Rotate
[Shift+D] -------------------------------- Duplicate

Keep in mind, if you move the PlayerSpawn too far from the ground, the player won't be able to spawn. You'll just see a white screen when you hit Run.

[Right-click] to select a voxel entity. The editor will automatically switch to the Voxel tab.

Select a brush to paint voxels with:



You can also hit [Space] with a voxel selected to open the Brush dropdown.

Press [Tab] to enter voxel edit mode. Movement controls remain the same.

[Left-click] ----------------------------------------- Fill current voxel cell
[Right-click] --------------------------------------- Empty current voxel cell
[Mousewheel] ------------------------------------ Change brush size
[Shift+Mousewheel] ---------------------------- Adjust jitter (useful for natural formations)
[F] --------------------------------------------------- Hold while moving to resize a box

With no entities selected, hit [Shift+Space] to open the Select menu. Type "World" and hit [Enter]. This selects the World entity, which tracks global settings for the map. The last setting is ThumbnailCamera:



This setting must point to a CameraStop entity. When you upload your map to Steam, the level editor will capture a screenshot taken from the viewpoint of the ThumbnailCamera.

Hit Workshop upload.



You can upload your map to an existing Workshop entry to update it, or select [new] to create a new Workshop entry.

Commands are actions or events which you can link between entities. For example, a PlayerTrigger could cause an Explosion to spawn.

Commands appear in the property pane when you select an entity. Each command has a Link button which shows how many commands it links to. When that command executes, so will all the linked commands.

• Hit Link
  
• For the Target, select the entity you want to link to
  
• Select which command you want to link (some entities only have one)
  
• Hit Link
  
• The link appears as a white line between the entities, and an entry in the command's link list
  
• Hit the minus sign (-) to delete the link

Here's an example of a PlayerTrigger linked to an Explosion: