v1.8.2

New features

• Editor windows can now move outside the main window.
• Added a "UI scale" setting to General settings. By default the editor uses the OS scale.
• Added the demir_rotatable(subtype, directions) profile procedure.
• The tgstation and SecondCity profiles now let atmospherics machinery rotate to the four cardinal directions.
• Added a "Show backups" button to General settings.
• "Reset keybindings" now asks which keybind preset to use.
• Toolbar tooltips now show each tool's keybind and a short usage hint.
• Settings sections now have larger headings, which makes them easier to find.
• Showing or hiding a type in the viewport is faster. The editor now updates only the affected atoms instead of the full map.

Fixes

• Fixed assignments to overlays, underlays, and vis_contents in the bake runtime. null now empties the list, and a list value is copied, not shared.
• Fixed overlays with a layer below FLOAT_LAYER, for example FLOAT_LAYER - 1, which drew over their parent. They now draw under it.
• Fixed tgstation layer manifold connections, which drew under the floor on hidden manifolds.

v1.8.1

New features

• Added a bundled SecondCity/Crimson Grid profile.
• Map previews now show the transform of atoms and overlays. Sprites turn and scale about their center, and an overlay uses its parent's transform unless it sets RESET_TRANSFORM.
• Added matrix support to the bake runtime: matrix(), Translate, Scale, Turn, turn() on a matrix, *, and ~.
• The tgstation profile now runs the overlay light component to draw lights, and it initializes grass and ash turfs.
• The goonstation profile now shows cable, cable spawner, and disposal pipe connections.
• Map edits are faster on large maps. The editor now updates only the changed part of the sprite buffer.
• Codebase loads use less memory on large maps.

Fixes

• Fixed x = locate(/type) in container, which did not search the container.
• Fixed initial() for type and parent_type.
• Fixed icons in list variables, which the editor did not load.
• Fixed appearance variables that a runtime initializer sets, for example icon_state = pick("a", "b"). The bake now exports them.
• Fixed new map views that did not dock in the center after an earlier session saved a different layout.

v1.8.0

New features

• Added Git integration for maps. Turn it on or off in the new Git settings category.
• • a three-way merge for map files. The viewport shows each merge conflict with its base, HEAD, and incoming versions.
• • conflict resolution. Use the HEAD or incoming version for a tile, a region, the selection, or all conflicts.
• • "Mark resolved". It stages the map with git add.
• • per-tile blame. It shows the last commit that changed each tile, and it can show a heatmap.
• • a "Blame history depth" setting. It sets the maximum number of commits that blame reads.
• • a Git panel with Status, Conflicts, Blame, and Diff tabs.
• • map diffs. Compare the working map with HEAD, a commit, a branch, or a tag.
• • a restore action for diffs. It copies changed tiles from an earlier version into the working map.
• • tile tooltips now show the changed objects and variables for conflicts and diffs.
• Added a Search panel. It finds all instances of a type, with options for subtypes and for the selected area only.
• You can go to, replace, or delete each search result, or all results at once.
• Added an inspector option to edit all identical instances of an object on the map.
• Added a variable filter and a "Modified only" option to the inspector.
• Added variable pinning to the inspector. Pinned variables show at the top for all objects.
• Added a Replace tool. Click an atom to replace it with the selected brush.
• Added an alternate tool action. Hold its keybind to make an object brush replace the objects on a tile, or to make a Delete drag remove all visible atoms.
• Added Cut and Delete for block selections.
• Added a Resize map dialog.
• Resize map and new Z levels now use the turf and area that you select, not the defaults.
• Added a Go to dialog. It moves the camera to a coordinate.
• Added New map, Recent maps, Save all, Close map, and Close all to the File menu.
• Added Copy, Cut, Paste, Delete, Deselect, Search, Go to, and Resize map to the Edit menu.
• Added keybinds to show or hide the area, turf, object, and mob layers, and to show all layers.
• Added screenshots of the full map or the selection. Save them as PNG files or copy them to the clipboard.
• Added a "Sanitize variables" option. When you save, the editor removes variables that are equal to the type default.
• The editor now merges identical dictionary entries when it opens a map.
• Added automatic map backups. The editor makes a backup when you open a map, and it deletes backups that are older than three days.
• Added a check for new releases at startup. Turn it off in General settings.
• Added keyboard camera controls. Arrow keys pan, Shift makes panning faster, Space with a drag pans, and = and - zoom.
• Held keybinds can now use a single modifier key, for example Shift.
• Added "Find on map" and "Copy type path" to the object tree context menu.
• Added "Mirror camera". It keeps pan, zoom, and Z level the same in all map views.
• Added Window > Reset layout.
• Updated stddef.dm for BYOND 516.1688.

Fixes

• Fixed new dictionary keys that made the key length longer when shorter keys were free.
• Fixed map saves that wrote dictionary keys past the BYOND limit.
• Fixed copy, cut, delete, and paste changing types that are hidden in the viewport.
• Fixed a middle click outside the map context menu. The menu now closes and the map pans.
• Fixed the welcome panel, which accepted input while a codebase loaded.
• Fixed the "Find similar..." button, which moved to a different line than the tile information.
• Fixed the tile grid of an inactive map view, which used the size of the active map.

v1.7.0

New features

• Added a DM compiler and bounded VM that run codebase profile hooks to preview maps without changing the map file.
• Profiles can bake atom appearances, including icon states, overlays, underlays, and lighting data. The editor and viewer display the results.
• Map edits, undo, and redo now rebake affected areas. Safe appearance previews are cached to reduce repeated work.
• Added profile selection in Compiler settings. Changing profiles rebakes open maps while preserving unsaved edits.
• Bundled profiles for CMSS13, Goonstation, Monkestation, tgstation, and Vanderlin, with an option to force a bundled profile.
• Profiles can define connection guides and map highlights for selected or hovered atoms, including Z-level labels on cross-level guides.
• Added profile-driven ImGui panels, selection popups, and controls that request targeted rebakes.
• Added a Node tool for connecting and routing profile-defined networks around blockers. A completed drag is one undoable edit.
• Profiles can register icon directions and connection openings so routed node segments orient automatically.
• Added a map context menu with clipboard actions, atom selection and replacement, layer ordering, selection mirroring, and node deletion.
• Added profile-driven lighting with point and cone sources, ambient light, blockers, emissive overlays, moving sources, and multiple Z levels.
• Added a lighting toggle and a minimum brightness slider for reducing darkness in the editor viewport.
• Added rmdc commands to inspect IR and bytecode, execute a DM entry point, and bake a map from the command line.
• Added source locations and grouped fault counts to compiler and bake diagnostics.
• Reduced compilation and bake work with reachable-procedure code generation, IR optimizations, and cached preview results.

Fixes

• Fixed connection guides lagging behind map edits.
• Fixed transform gizmos acting on a selected sprite from another Z level.
• Fixed offset light fixtures failing to illuminate tiles within their range.
• Fixed emissive overlays and appearance flags being applied incorrectly to baked lighting.
• Fixed visibility-buffer layering during sprite rendering.
• Fixed tgstation preview handling for multi-Z pipes and glass airlock overlays.
• Fixed focus-on-hover pulling focus away from open popups.
• Fixed map context-menu actions while the Node tool is active.
• Added a visible checkerboard placeholder for missing icons.
• Fixed trailing commas in DM list() calls creating an unintended empty entry.

v1.7.0-preview1

add postlude injection

v1.6.0

New features

• Reworked the select tool: selections can now be resized by dragging edge/corner handles, and bucket fill now respects the active selection for full or hollow (border) regions.
• Added a tile grid overlay and a pixel grid for the selected tile, each with a configurable minimum zoom before auto-hiding and an optional axis-color highlight.
• Added keybinds for toggling the tile grid (G) and pixel grid (Shift+G).
• Added a "Focus windows on hover" option to focus editor windows when hovered.

Fixes

• Fixed a regression that dropped underlay outline (sprite edge) rendering.
• Fixed #if 0 (and other inactive preprocessor branches) leaking lexer errors from code inside the dead branch.
• Fixed DM string literals not decoding escape sequences (\n, \t, \r, \, ", ', [, ]).
• Fixed unbounded memory growth from interned symbols never being freed.
• Hardened the parser and object tree against panics: the parser now rejects a file once its expression limit is hit instead of overflowing, and a parent_type cycle is now rejected instead of corrupting the tree.

v1.5.0

New Features

• Added a dedicated Settings window with configurable viewport, object tree, general, and keybinding options.
• Added keybindings for recent palette entries.
• Added StrongDMM-compatible keybinding presets.
• Added support for creating additional Z levels in maps.
• Added GPU sprite culling with indirect drawing for improved rendering performance.

Fixes

• Fixed R being unavailable for keybinding assignments.

v1.4.0

New features

• Selecting an instance on the map now reveals and scrolls to it in the object tree.
• Object tree can now draw line indicators connecting parent and child entries, toggleable in settings.
• Added a confirmation prompt when closing the editor with unsaved changes, matching the existing prompt for closing a map.
• Added a dedicated Save keybind (Ctrl+S by default).

Fixes

• Undo and redo keybinds now repeat while held instead of requiring a fresh press each time.
• Rendering now always presents with vsync (FIFO) instead of preferring mailbox, avoiding tearing and unnecessary GPU usage.
• Fixed the object tree search bar shifting position instead of staying pinned above the list while scrolling.

v1.3.0

New features

• Open in editor: jump straight from a prefab instance to its definition in your preferred code editor, with a configurable command template.
• Undo/redo support in the UI, with correct tracking of the saved state across merged edits.
• Jump to similar instances: find and jump to every other instance of the same prefab on the map.

Fixes

• Fixed the selection/offset guide being projected incorrectly when the viewport was scaled or resized.

v1.2.0

New features

• Multiple map views: open and work with several maps side by side in independent, dockable views.
• Object tree filtering by base type (atom/movable/obj/turf) or a custom type path.
• Object tree search can now match atom/object names in addition to type paths, with a toggle for each mode.
• Object tree list now uses a virtualized list clipper, keeping large object trees responsive.

Fixes

• Fixed the settings window opening at an inconsistent/off-center position.