The Meta Road Editor Mode

MetaRoad ships its own Unreal editor mode, shown as Meta Road in the level-editor mode dropdown. It is the single entry point for all road authoring — drawing roads, editing them, previewing, and baking all happen here. There is no separate “road” toolset in Modeling Mode any more.

The Meta Road editor mode selected in the level-editor mode dropdown

The tile palette

The mode’s panel is an integrated tile palette at the top, split into four categories. Selecting a category shows its tiles; selecting a tile activates that tool or editing sub-mode and shows its panel below.

The categories, in order (Create is the default when the mode opens):

Create — make road geometry

The Create category tiles in the Meta Road mode panel

Interactive tools that place new roads. (All except Spline are Pro.)

Tile	Creates
Spline	A new road spline (`URoadSplineComponent`) drawn on a surface — see Draw Spline Tool
Roundabout (Pro)	A circular roundabout road — see Roundabout Tool
Intersection (Pro)	A junction linking several roads — see Intersection Tool
Crosswalk (Pro)	A pedestrian crossing on the selected road — see Crosswalk Tool
Chevron (Pro)	A chevron guide-island marking — see Chevron Marking Tool

Edit — shape the selected road

The Edit category tiles in the Meta Road mode panel

Sub-modes for editing a selected road. Each swaps in a viewport editor and a Details “Selection” panel.

Tile	Edits
Spline	The reference line: nodes, tangents, arc nodes, endpoint connections — see Spline Mode
Section	Lanes and lane sections — see Section Mode
Offset	The center-line offset curve — see Offset Mode
Width	Per-lane width curves — see Width Mode
Attribute	Lane attributes (markings, guardrails, …) — see Attribute Mode
Preset	Stage mesh-build settings/presets against the live preview — see Preset Mode

Bake — generate output

The Bake category tiles in the Meta Road mode panel

Tile	Does
Bake	Generate or clear road mesh assets/actors (Bake / Clear, Selected / All) — see Baking
Export	Export road meshes to `.fbx` files — see FBX Export

Misc

The Misc category tile in the Meta Road mode panel

Tile	Does
Visibility	Editor visibility settings (tile renders, unhide splines, debug draw) — see Visibility

Schematic vs Preview

At the top of the panel a toggle switches the viewport between two views:

Schematic — the editable lane graph drawn by the editing sub-modes. This is where you author.
Preview — a live, non-destructive preview of the generated road mesh. Nothing is written to disk; it rebuilds as you edit. Two icon buttons appear next to the toggle while you are in Preview view:
- Build status — reflects the live preview build: a spinning throbber while it computes, then a green success, a yellow warning or a red error icon when it finishes. It is hidden while the preview is idle. Click it to open the Output Log and read the full build messages.
- Update / Stop — normally a refresh icon that rebuilds the preview from the current spline data and build settings. While a build is running it turns into a red stop icon that cancels the in-progress build. It is disabled when there is no active preview to rebuild.

The Schematic and Preview toggle with the build-status and update buttons at the top of the mode panel

Editing splines outside the mode

The default Spline editor is always active, even when you are not in the Meta Road mode: select an AMetaRoad in the level and you can edit its road spline’s points/tangents directly. The other Edit sub-modes (Section / Offset / Width / Attribute) require the Meta Road mode to be active.

AMetaRoad-only

Road splines are only picked up by the build/preview/bake pipeline when they live on an AMetaRoad actor; splines on other actors are ignored. The Create tools always produce AMetaRoad actors for you. See The MetaRoad Workflow for the full picture.