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Building

Stairs, slabs, walls: every building shape

Each building material comes in nine shapes. You cut them from whole blocks on the crafting grid, in the material you put in.

In short

  • Nine shapes in four families: blocks (cube, pillar), slabs (slab, half slab, vertical slab), stairs, walls and fences (wall, fence, pane).
  • A grid cell takes a whole block of one material (64 voxels). Four cubes, six slabs, six stairs, six walls, eight fences…
  • Stairs turn into corners on their own; two vertical slabs at a right angle make an L corner.
  • Walls, fences and panes link to their own kind, to cubes and to pillars, and redraw themselves when a neighbour comes or goes.
On this page
  1. Which building shapes exist?
  2. How do I craft and place a shape?
  3. How do stairs and slabs join up?
  4. How do walls, fences and panes link?
  5. Questions

Which building shapes exist?

FamilyShapeWhat it isCraft (blocks of one material)
BlocksCubeA full 1 m cube2 × 2 blocks → 4 cubes
BlocksPillarA 50 cm square column in the middle of its cell1 cube → 4 pillars
SlabsSlabHalf a block, 50 cm thick3 blocks in a row → 6 slabs
SlabsHalf slabA 25 cm layer, at the bottom or top of its cell1 slab → 2 half slabs
SlabsVertical slabHalf a block standing up, against the side you face3 blocks in a column → 4 vertical slabs
StairsStairA staircase step block6 blocks laid as a staircase (1, 2, 3) → 6 stairs
Walls and fencesWallA 50 cm post with arms 75 cm high toward neighbouring walls3 × 2 blocks → 6 walls
Walls and fencesFenceA 25 cm post and two railsblock, stick, block in a row → 8 fences
Walls and fencesPaneA 25 cm thick panel, full height: a glass window, a plank partition1 vertical slab → 1 pane

Doors, trapdoors and chests have their own page: Doors and locks. In creative, the catalogue shows the shapes family by family.

How do I craft and place a shape?

  1. 1

    Put whole blocks on the grid

    Each cell of the 3 × 3 grid takes one whole 1 m block (64 voxels) of one material. The result is cut in that material: birch planks give birch stairs, granite gives granite walls.

  2. 2

    Take the pieces

    A shape never gives more matter than it took, so crouch-breaking cannot make stone out of nothing. Unsure what a block can become? Point at it in your inventory and press I.

  3. 3

    Aim and right-click

    The shape goes against the aimed face on the 1 m grid, facing you. Orange preview: crouch to place it on its empty voxels. Red: impossible.

How do stairs and slabs join up?

  • Stairs: next to a stair turned a quarter turn, at the same height, a stair becomes an outside corner (the other one is behind it) or an inside corner (the other one is in front). Neighbours redraw when you place or break one.
  • Slabs: a slab put on top of a bottom slab (or under a top slab) fills the other half of the cell. Against its side, it keeps the same half. Elsewhere, it takes the half you aim at.
  • Vertical slabs: against the inner face of another, one fills the other half. On top, below or at the ends, it extends the wall in the same direction. Turned a quarter turn in front of another, it turns it into an L corner of 48 voxels: two slab walls meet with no gap, and a T closes too.

How do walls, fences and panes link?

A wall, a fence or a pane reaches toward neighbouring cells that hold the same kind, a cube or a pillar, and redraws itself whenever a neighbour comes or goes. A straight run of walls has no post in the middle. On the 25 cm grid, the post of a fence or a pane sits a quarter of a block off the centre, always on the same side.

Questions

Can I make stairs out of any material?

Any solid full-cube material: rocks, bricks, concrete, glass, metal, planks. Ores, leaves, liquids and light sources do not take shapes.

How do I make a thin wall?

Use vertical slabs: they are half a block thick. Turn one a quarter turn in front of another to close the corner.

How do I make a window?

Make a vertical slab from glass blocks, then craft it into a pane: one vertical slab gives one pane.

Updated