Not sure what you mean by "custom node": all nodes you see in your average minetest world (regardless of the game; if it has nodes, of course) are registered by minetest.register_node(), so there's no real difference between, for instance, a default minetest_game furnace and a hydrogen canister from TechAge other than their properties and the license (TechPack is under GNU AGPLv3 and MTG is GNU LGPLv2.1 -- both are free).
Any node will do. Just select it in your hotbar (try it with scifi_nodes!) and write '/blockhead' in the chat. Enjoy, bro! And don't forget to share the software.
will it work ?
Not sure what you mean by "custom node": all nodes you see in your average minetest world (regardless of the game; if it has nodes, of course) are registered by minetest.register_node(), so there's no real difference between, for instance, a default minetest_game furnace and a hydrogen canister from TechAge other than their properties and the license (TechPack is under GNU AGPLv3 and MTG is GNU LGPLv2.1 -- both are free).
Any node will do. Just select it in your hotbar (try it with scifi_nodes!) and write '/blockhead' in the chat. Enjoy, bro! And don't forget to share the software.