Architect Mode fundamentals

Architect Mode is where you draw. Pick a preset, click out a path in the viewport, and the actor generates along it as you go; the same mode edits existing paths point by point.

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1 Mode, grid, snapping, and gizmo settings2 Preset Library with the active Building preset3 Live viewport instructions4 The selected preset's authored data5 Finish, close, and cancel6 Grid toggle, spacing, and grid space

Draw a path

1. Enter Architect Mode from the Modes panel or the Spline Architect menu.
2. Browse Presets and pick a Wall, Building, or Curve preset. The plugin includes starter presets; try Wall from SA_Walls for your first path. If the library appears empty, check the preset filters and installation.
3. Click in the viewport to add points.
4. Click the first point to close the loop - the right move for a building footprint - or click the last point or press Enter to finish an open run like a fence.

While drawing:

Input	Result
Left click	Add a point.
First point	Close the loop.
Last point or Enter	Finish the open path.
Shift+Enter	Close and finish.
Ctrl	Lock the next segment to Angle Snap Degrees.
G	Toggle the Architect Mode grid.
Alt	Use one tenth of the current grid step.
Delete	Remove the last point.
Esc	Cancel the new path.

Edit an existing path

Select a Spline Architect actor and enter Architect Mode. Click points or segments, Shift-drag a marquee, or press Ctrl+A for everything. Points drag directly; the gizmo adds axis and plane handles when you want a constrained move.

Input	Result
Ctrl+click a segment	Insert a point.
Shift+drag	Box-select points and segments.
Ctrl+I	Invert the current point/segment selection.
Delete	Remove selected points or segments.
L	Toggle loop state.
Click an endpoint	Begin extending the path.
Shift+drag a handle	Extrude selected geometry.
Right-click	Open context actions, including branching.
Alt+click an actor	Pick a different Spline Architect actor under the cursor.

Placement Profile decides where clicks land: Planar Locked keeps a footprint flat, which is what architecture usually wants; Surface Projected follows terrain, which is what paths and fences usually want. Everything else - branching, snapping, shapes, the grid - is in the Architect Mode reference.