Projects and saving

A project is a folder

File > New project… makes a folder with the project file and everything it uses:

• Directorymy_apartment/

  • my_apartment.ieproj the project itself
  • DirectoryAssets/

    • DirectoryMaterials/ one file per material

      • …
    • DirectoryTextures/ images you imported

      • …
    • DirectoryModels/ props copied from the game, your own models, window prefabs

      • …
    • DirectoryTrims/ custom trim profiles (.ietrim)

      • …
  • DirectoryBackups/ automatic backups

    • …
  • DirectoryExport/

    • …

Because everything the project uses is inside the folder, you can zip it up, move it to another PC or send it to someone else.

Naming

Name your interior with letters, digits and _ only, under about 40 characters. The exported file names start with it, and the game is picky about names.

Saving

Key	Action
Ctrl+S	Save
Ctrl+Shift+S	Save as (switch to the new copy)
Ctrl+Alt+S	Save a copy (write the project under another name without switching to it)
Ctrl+O	Open a project
Ctrl+N	New interior

File > Open recent reopens the projects you worked on, and the Welcome window lists them at start. File > Revert (from the command palette) goes back to the last saved state.

Autosave, backups and undo

• The editor autosaves and keeps backups in the project’s Backups/ folder.
• After a crash it offers to recover your work at the next start.
• Every action is an undo step with a name (“Align left (4 props)”). Ctrl+Z undoes, Ctrl+Y or Ctrl+Shift+Z redoes, and Window > History lists every step so you can go back several at once.

Assets you bring in

• Images: drop PNG, JPEG, TGA or DDS files from Explorer onto the Assets window, or use + Add > Import texture….
• Models: File > Import > Model as a prop (.glb / .gltf)… brings a model of your own in as a prop.
• Props from the game are copied into Assets/Models/ the first time you use them.
• Trim profiles are portable .ietrim files: see Trims and skirting.