Destructible environments. Ala, Teardown. https://forum.unity.com/threads/want-to-recreate-teardown-de... The discrete voxels can be smaller than in Minecraft, and behave like physical box shaped objects when dislodged.

Dual Contouring? https://www.boristhebrave.com/2018/04/15/dual-contouring-tut...

voxels processed through marching cubes algorithm - https://developer.nvidia.com/gpugems/gpugems3/part-i-geometr...