The W.M.D World Editor is an application that allows importing of PNGs (and jpegs) to be used as landscapes. They can then be uploaded to Steam Workshop and shared online.
It can be found within the Tools submenu of the Steam Library.


The full landscape size is 8192x4096

Anything not 100% transparent will be counted as collision. Creating a new image (PNG) with a fully transparent background, then pasting a cut-out of your required image is one method.


File Menu
New: Clears the current landscape (with confirmation).

Open: Opens an existing .wld file (temp landscape, these are not used by the game or Steam Workshop only the editor).

Save: Saves the landscape as a .wld file (temp landscape, these are not used by the game or Steam Workshop only the editor).

Save As: Saves the landscape as a .wld file (temp landscape, these are not used by the game or Steam Workshop only the editor).

Import Landscape: Allows you to select an existing .png to load as a landscape. This will overwrite any exiting landscape you have loaded.

Publish: Opens the publish dialog when you are ready to submit your landscape to Steam Workshop.

Exit: Exits the Worms W.M.D World Editor (with confirmation).


View Menu
World Info: Toggles the World Info panel on and off.

Render Menu
Render Environment: Toggles the sky and background on and off (These will still be rendered in game, setting background to simple ingame will remove the sky).

Render Grid
Toggles the grid on and off.

Help: Opens the help window and link to the World Editor notes (online).

World Info Panel
Contains information about your level which will be visible through Steam Workshop and properties such as which theme (water, sky, background soil) and whether or not it is a cavern (indestructible border and strike weapons disabled).

Name: Allows you to name your landscape.
Description: Lets you to add a description for your landscape.
Theme: Sets the theme for the landscape (this affects the water, sky, background soil).
Is Cavern: Sets the landscape to be a cavern, this adds indestructible borders, limits the camera and disables strike weapons.
Landscape View: Shows how your landscape will look in game and its position in the game world.
Info Bar: Displays X,Y coordinates.

Publish Dialog:
Found within the file menus, allows you to publish your landscape to Steam Workshop.
Update existing level: Whether or not to publish as new content or to update an existing landscape.

Title: The name of your landscape (also takes entry from World Info). Used for Workshop.

Description: The description of your landscape (also takes entry from World Info). Used for Workshop.

Preview Image: Allows you to select an image of your landscape for use on Steam Workshop and in the in game preview. Clicking ‘S’ will generate an image using the current landscape, alternatively you can select an existing image.

Visibility: You can select if the landscape is Public, Friends only or Private on Steam Workshop.

Agree to terms / view terms: Allows you to view the Steam subscriber agreement. You must agree to the terms before you can publish your landscape.


Once your landscape is uploaded to steam you will need to subscribe to your uploaded landscape for it to appear in game.

Once ingame, Workshop landscapes can be found in the Advanced Landscape options under Load. Here your subscribed levels are listed; highlighting one and selecting confirm will load that landscape.

When playing online, if a client doesn’t have the Workshop landscape they will temporarily download it for the match.