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CraftShape

Minecraft Dome Generator

Set the diameter and the height separately to get shallow saucers, true half spheres or tall cathedral domes — every layer drawn as a circle you can build straight away.

Dome Generator — 25 x 25 x 13 blocks — Bottom to top • front edge at the bottom of the grid (north)

Controls

Size

Size

blocks

Match this to the outer diameter of the tower or room below.

blocks

Half the diameter gives a true half sphere.

Shell

Shell

Fill mode
blocks

Off adds the floor ring for a free-standing dome.

Appearance

Appearance

Block color

Dome Generator — layer 1

25 x 25 · 68 blocks · Layer 1 of 13

Drag to pan, scroll or pinch to zoom, hover a cell for coordinates.

Layer 1 of 13. Bottom to top • front edge at the bottom of the grid (north).

Layer navigation

Layer 1 of 13

Left and right arrow keys move between layers.

Use this pattern for layers 1–2 (2 times).

Side elevation

Layer 1 highlighted

Building this with friends?

Launch a private Minecraft server, invite your team, and bring this blueprint to life together.

Read our plain-English guide first — no offer attached.

Start a Private Server

Build summary

Layer
1 / 13
Blocks in layer
68
Layer width
25
Total blocks
929
Footprint
25 x 25
Height
13 blocks
Height : diameter
0.52

Build direction: Bottom to top. The bottom edge of every grid is the front (north) side, the top edge is the back, left and right stay as shown.

Layer 1 instructions

Includes every row, even the empty ones.

  1. Row 1:skip 9 spaces, place 7 blocks
  2. Row 2:skip 7 spaces, place 2 blocks, leave 7 spaces, place 2 blocks
  3. Row 3:skip 5 spaces, place 2 blocks, leave 11 spaces, place 2 blocks
  4. Row 4:skip 4 spaces, place 1 block, leave 15 spaces, place 1 block
  5. Row 5:skip 3 spaces, place 1 block, leave 17 spaces, place 1 block
  6. Row 6:skip 2 spaces, place 1 block, leave 19 spaces, place 1 block
  7. Row 7:skip 2 spaces, place 1 block, leave 19 spaces, place 1 block
  8. Row 8:skip 1 space, place 1 block, leave 21 spaces, place 1 block
  9. Row 9:skip 1 space, place 1 block, leave 21 spaces, place 1 block
  10. Row 10:place 1 block, leave 23 spaces, place 1 block
  11. Row 11:place 1 block, leave 23 spaces, place 1 block
  12. Row 12:place 1 block, leave 23 spaces, place 1 block
  13. Row 13:place 1 block, leave 23 spaces, place 1 block
  14. Row 14:place 1 block, leave 23 spaces, place 1 block
  15. Row 15:place 1 block, leave 23 spaces, place 1 block
  16. Row 16:place 1 block, leave 23 spaces, place 1 block
  17. Row 17:skip 1 space, place 1 block, leave 21 spaces, place 1 block
  18. Row 18:skip 1 space, place 1 block, leave 21 spaces, place 1 block
  19. Row 19:skip 2 spaces, place 1 block, leave 19 spaces, place 1 block
  20. Row 20:skip 2 spaces, place 1 block, leave 19 spaces, place 1 block
  21. Row 21:skip 3 spaces, place 1 block, leave 17 spaces, place 1 block
  22. Row 22:skip 4 spaces, place 1 block, leave 15 spaces, place 1 block
  23. Row 23:skip 5 spaces, place 2 blocks, leave 11 spaces, place 2 blocks
  24. Row 24:skip 7 spaces, place 2 blocks, leave 7 spaces, place 2 blocks
  25. Row 25:skip 9 spaces, place 7 blocks

How the dome is calculated

A dome is the top half of an ellipsoid. For every block, the generator measures how far its centre sits from the dome's vertical axis and from the base, scales those distances by the radius and the height, and keeps the block when the combined value falls inside the shell. Setting the height to exactly half the diameter produces a true half sphere; anything else stretches or squashes the curve while keeping it perfectly symmetrical.

Choosing a shape

  • Shallow (height ≈ diameter ÷ 3) — observatory and rotunda roofs, quick to build, low on materials.
  • Half sphere (height = diameter ÷ 2) — the classic dome; works on almost any round tower.
  • Tall (height ≈ diameter) — cathedral and onion domes; add a lantern or spire on top.

Building it from the ground up

  1. Build the base circle on the wall or floor and mark the four compass points.
  2. Work up one layer at a time; each ring is slightly smaller than the last.
  3. Use the repeat hint where consecutive rings match to save re-checking the plan.
  4. Close the crown last — on wide domes it may be a single block or a small 2x2.

Frequently asked questions

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