Build guide
Best uses
This generator is useful for observatories, underwater bases, cathedral roofs and greenhouses. The planner gives a block-by-block shape plan and material total before you start placing blocks in your world.
How to build it
A dome is the upper half of a sphere. Build the base circle first, then follow each smaller layer upward.
Planning tip
Dome plans are easier than full spheres because the lower half is removed.
Before you start
Choose the final outside dimensions, check whether the centre is 1×1 or 2×2, and gather the stack total shown by the tool. For large builds, use the printable layer or quadrant plan instead of trying to follow a giant grid on one screen.
Make the base ring match the walls
A dome roof starts with the widest ring, so its diameter must match the outside wall footprint. Place the base ring first, inspect it from above, then move upward through smaller layers. Keep the centre scaffold until the roof is stable.
Use domes for roofs, not just decoration
Glass domes, observatories and arena roofs need enough headroom below the curve. Plan the wall height and entrance before choosing a dome diameter. Add panes, stairs and ribs only after the plain layer shell is symmetrical.
Leave room below the curve
A dome can look correct from outside while leaving too little headroom inside. Test the base ring against the planned wall height, entrance and platform before adding upper layers. This is especially important for greenhouses and observatories.
Finish the shell before the glass and trim
Use simple structural blocks to prove the layer plan first. Once the dome is symmetrical, add glass panes, support ribs, lights and decorative materials without losing the shape.
FAQ
Does this work in Java and Bedrock?
Yes. These are manual block-placement blueprints, so the visual plan works in both editions.
Can I export the plan?
The Shape Planner supports JSON and CSV layer exports. PNG, SVG and print exports are available for compatible 2D blueprints.
More build questions
How do I build a dome from a sphere plan?
Use the Dome Generator rather than building the lower half of a sphere. Begin with the widest base ring and follow smaller layers upward.
What dome size is good for a greenhouse?
A medium footprint gives useful interior space. Test the base ring against your planned walls before gathering all materials.
How do I avoid a lopsided dome?
Mark the centre and cardinal anchors first, then complete each layer before moving upward.
This tool also covers Minecraft dome calculator, dome maker and hemisphere generator intent by turning the roof into a sequence of buildable horizontal layers.
Should I build a dome from the bottom or top?
Build from the widest base layer upward. The base ring sets the footprint and makes the smaller upper layers easier to centre.
Can I make a hollow glass dome?
Yes. Choose an outline or wall style, then use glass or another transparent block for the layer plan.