Can someone please tell me how to do this kind of structure?
Quite probably this is some sort of “variation” of that thing (i.e. a Recursive “random 3d grid node connection” under some rules - meaning that if you change the rules you’'ll get an other result):
That said I’m not in the Art market sector (so I did that for entirely different purposes) . It’s most unlikely that you can do it without code (Required level: mid to advanced). If by accident you are in the C# bandwagon … I could provide some indicative hints.
You could use surely discrete fields and aggregation fro WASP