Architecture

Since 1.27 you can build rooms and houses from parametric pieces: walls with doorways and window openings, doors and windows that open, and four kinds of stairs. Every piece is a set of numbers you can change at any time, and doors swing open for everyone in the session.

Adding a piece

Right-click the viewport ▸ Add ▸ Architecture (or type the name into the Add menu's search):

Group	Items
Walls	Wall · Wall with door · Wall with windows · Wall with door and windows
Doors	Door · Double door
Windows	Window · Casement window
Stairs	Stairs (straight) · Stairs (L) · Stairs (U) · Stairs (spiral)

Pieces from the Add menu land on the 1 m grid.

In VR

Since 1.28 the headset's radial menu has the same twelve pieces under Add ▸ Architecture ▸, with the same names. Each one lands 3 m in front of you. See The first ring.

Editing a piece

Select the piece and open its Properties: the Geometry section holds every number. Rows that do not apply are hidden — a wall with no doors has no Door width row.

Wall

Row	What it sets
Length · Height · Thickness	the size of the wall
Doors · Door width · Door height	how many doorways and their size
Windows · Win width · Win height	how many window openings and their size
Sill height	how far above the floor the window openings start
Shift	slides the openings along the wall

Openings are spread evenly along the wall, centred on half metres, and a 10 cm pier always stays between them. The wall's origin is its start end, on the floor, so walls of a whole number of metres snap end to end on the grid.

Door

Row	What it sets
Width · Height	the opening the door fills
Frame depth · Frame	how deep and how wide the frame is
Leaves	single or double
Hinge	left or right (a single door)
Opens	in or out
Swing °	how far it opens
Glass panes	panes of glass in the leaf (0 for a solid door)
Sill	a threshold at the bottom
Opens on	click, or proximity — it opens when someone walks up to it

Window

Row	What it sets
Width · Height	the size of the window
Sill height	how far above the floor it sits
Frame depth · Frame	how deep and how wide the frame is
Panes across · Panes up	the glazing bars
Sill ledge	a ledge under the window
Opens	fixed, or casement (it swings open)
Hinge	left or right (a casement)

Stairs

Row	What it sets
Shape	straight, L, U or spiral
Width · Steps	how wide the stair is and how many steps it has
Rise · Run	the height and depth of each step
Turn	left or right (L, U and spiral)
Flight gap	the space between the two flights of a U stair
Column	the thickness of a spiral stair's centre column
Solid · Tread	a solid stair, or open treads of this thickness

Fitting a door or window into a wall

A door and a window both sit centred on their opening, at floor level. To fit one into a wall, place it on the same grid point as the centre of the wall's opening, with the same size as the opening (and, for a window, the same Sill height). The pieces from the Add menu already match each other.

Doors and windows that open

In Interact and Play, click a door to open or close it, or walk up to a door set to open on proximity. Casement windows open the same way. Every peer sees the same swing, and a player who joins later sees the door already open. In Edit a door always shows shut, so it is easy to place.

Collisions

• Walls and stairs collide with their exact shape: doorways stay open, and a walking player climbs steps up to 0.3 m high.
• A door's frame blocks around the doorway, and its leaf blocks only while it is shut.
• A window is a solid slab.

Limits

• The parts of a door or window are rebuilt from its numbers on every device, so editing the mesh of a door changes only its frame.
• Very steep stairs (a Rise near 0.3 m) are the most a walking player can climb.