so i had a dream where a group and i were magically summoning like, liquid stone and by-hand forming it into walls--this is clearly half-baked and inefficient--so how would YOU make or enhance construction processes using magic, sci-fi technology, or fictional materials?
i cant find an image on google but the LANCER rpg rulebook has art of a 6 legged, 2 armed mech that carried a giant 3d printer nozzle to print buildings with (the building looked kinda like soft-serve ice cream or frozen yogurt) and i thought that was really cool.
ur liquid stone thing reminds me of how the Eldar in warhammer 40k 'sing' buildings into shape with a material called Wraithbone. i think using magic to approximate modern construction methods is pretty cool, magical liquid stone is basically proto-concrete. illusion magic and low-level spells/cantrips like in DnD could also be used to help with more traditional construction, like projecting a 1:1 scale blueprint on the project area or using prestidigitation cantrips to clean and style stuff.
also since another comment mentioned golems, they make an excellent fantasy construction mech (also more golems should be able to be piloted imo)