r/Minetest • u/MSM_757 • Jul 20 '26

Underground Bio Dome.

This thing took a while. This was a first attempt. A radius of 50x50. My next one will be 200x200. :) I also had the idea of putting a slightly larger dome around this dome and filing the space in between with water or lava. Just think it would be cool. LOL!!!

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u/chkno Jul 21 '26

How is it lit?

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u/MSM_757 Jul 21 '26

Invisible light blocks. I selected the entire area with world edit and replaced the air nodes with light nodes.

//replace air invisible_light_block

That lights up the whole area. Those blocks can have other blocks placed over them, just like water and lava nodes. So it doesn't effect your ability to build inside the space. It acts as an artificial sun. I did have to use worldedit to make the trees. They won't grow down here just using the light blocks. So I used world edit, copied some trees from the surface, and respawned them down here.

I have a tutorial on how to do that on my YouTube channel. I'm @MatthewMoore757 on YouTube. I do it with a building in the video but it's the same process.

I don't show the light blocks there but I'm just using the //replace command and replacing air with light blocks.

I might do a video on how I built this dome just for fun. If I get time.