How to build a dome
- Set the width and depth of the base. For a round dome keep them the same.
- Set the height. For a classic half sphere use about half the width, rounded up (11 for a 21 wide base).
- Build layer 1, the widest ring, on top of your walls. Then press Up and build each layer, using the pale blocks of the layer below to line up.
- Print all layers if you want a paper copy of the whole roof.
Dome shapes
- Half sphere: height = half the width, rounded up. Good for observatories and churches.
- Flat dome: height about a third of the width. Good for big halls where a tall roof would look odd.
- Tall dome: height equal to or more than the width. Good for towers and onion domes.
How the dome is worked out
A dome here is the top half of an ellipsoid that is twice as tall as the dome height. Each block is tested at its centre, and a hollow dome keeps every block that touches the outside on one of its 6 sides, so the roof has no see through gaps.
More tools
Questions
How do I build a dome in Minecraft?
Set the width of the base and the height of the dome. Build layer 1 (the base ring) first, then press Up and build each smaller ring on top until you reach the single top block.
How do I make a flatter or taller dome?
Untick Same size every way and change the height. A height of half the width gives a round half sphere; less than half gives a flatter, wider roof; more gives a tall onion style dome.
Does the dome fit on a circle wall?
Yes. The widest layer of the dome has the width you set, so build the wall below it with the circle generator at the same width.
Can I make a solid dome?
Untick Hollow to fill it, for example for a hill or a mound.