How can I build a smooth dome?

I'd like to build a dome roof on a building. There is a trick using command blocks and blocks "riding" minecarts to create a smooth sphere:

It'd like to use something like this to create a half-sphere for my roof.

The trick via command blocks and minecarts works but takes a lot of time. Is the only option to use command blocks, or is there a mod or filter to do something like this or to automate the minecart trick?


To be clear, it should be like this:

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It should not be like this:

enter image description here

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2 Answers

This can be achieved with Carpenter's Blocks. It's a mod that adds angled/sloped blocks to minecraft. You will need to use a lot of them to achieve your goal and the sphere will not be entirely spherical - but it will be a lot better than the Vanilla attempt. One warning: Carpenter's Blocks, when used in large numbers cause significant lag, so whether or not you use this method depends on your PC specs and the size of your roof.

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You could just run the filter and remove all minecarts with a y-rotation larger than 90°

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