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Thank you all for the savant replies.


Make chemical "a" 0/sisyphus/boulder* and chemical "b" be height, and maybe chemical "c" to view what's going on.


So that's how they generically categorized multi-layered automata : chemicals ! Thanks, this word's pretty handy.


I think the “Nothing ...

A height map contains one real (float) value for each cell, and is provided as a sort of invariant fixture/environment for the automaton.

It can be thought of as the map of the altitude of each cell.
Some Perlin noise that provides terrain looking like a bunch of hills works great.


Example ...