Revert "SpaceMap not commited"

This reverts commit f0a9eb41323a26f073a4f8e5f4153e7ca3bc4df3.

Revert "Separate particles for cubes"

This reverts commit
7d4ee601e259ce46cc20193c51eddba60ef19d21.

SpaceMap not commited

Separate particles for cubes

The particles are now in their own unique
particle storage buffer shared
among all cubes.
Revert "Revert "SpaceMap not commited""

This reverts commit 2699a3facef59566f24c9bdd393a401decbb5812.