ph8jPf9M wrote:-they need an option to load placeholder blocks so that you can still build it yourself just easier since you have placeholders blocks in place where you should put that certain block. Placeholder blocks should have propreties like water but without slowness, drowning and swimming.
One idea behind handle_schematics (and the original build chest from random_buildings) was to place a scaffolding node first and then - when the player has inserted all of one type of material into the build chest - replace those scaffolding nodes that stand for that particular material with the material provided by the player. Scaffolding already allows swimming-like movement - you can climb it and "walk on it.
Indicating which block ought to go where by putting small indicator blocks could work through entities. That would get problematic as soon as there are too many of them.