mappings.lua

local dungeon_styles= {
	{
		-- tower of hera
		-- palette = 'dungeon.tower_of_hera.1';
		tier_introduction = 3,
		tileset = 'dungeon.tower_of_hera',
		floor = {
			scope = 'room',
			{
				high = { 'floor.a.12.high', 'floor.a.6.high' },
				low = { 'floor.a.13.low.' },
				p = 0.75,
			},
			{
				high = { 'floor.b.12.high', },
				low = { 'floor.a.13.low', },
				p = 0.25,
			},
		},
		wall_pillars = {
			scope = 'room',
			{
				socket = { 'pillar.4', },
				socketless = { 'pillar.4.socketless' },
			}
		},
		drapes = {
			scope = 'room',
			{ nil },
		statues = {
			scope = 'room',
			{ 'statue.1', p = 0.25 },
			{ 'statue.2'},
		},
		wall_statues = {
			scope = 'room',
			{ 'wall_statue.6' },
		},
		barrier = {
			scope = 'dungeon',
			{ 'barrier.1' },
		},
		hole = {
			scope = 'room',
			{ 'hole' },	
		}
		big_barrier = {
			scope = 'dungeon',	
			{ 'big_barrier.3' },
		},
		stage = {
			scope = 'dungeon',
			{ 'stage.1' },
		},
		entrance = {
			scope = 'dungeon',
			{ 'entrance.1' },
		},
		entrance_statue = {
			scope = 'dungeon',
			{ 'entrance_statue.4' },
		},
		music = {
			scope = 'dungeon',
			{ 'dungeon_light' },
		},
		destructibles = {
      			pot = 'entities/vase',
        		stone1 = 'entities/stone_white',
        		stone2 = 'entities/stone_black',
		},
	},
},

Then we need not declare displacements. Updating

How's floor supposed to be interpreted? For each room (or dungeon, depending on scope), choose a candidate. For each room (always, independent of scope), choose a high and a low floor from this candidate? In that case, maybe the floors of most styles should be dungeon scoped? Or is there a better interpretation?