Modding Discussion • Re: How to do an Underground Magma/Lava Lake or Lava pocket?

Luanti Forums - Index page [Unofficial] April 18, 2026

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You could detect caves generated by the mapgen and fill those with lava.

Use an on_generated callback
Retrieve the VoxelManip objects (+ data)
Probe a few positions by scanning upwards or downwards in the vmanip data for "air" nodes.
If there are sufficient "air" nodes, do replace all of them under a certain Y coordinate with >= 1 lava source
Write the data back to the map
Test it.

Statistics: Posted by Krock — Sat Apr 18, 2026 11:54