diff --git a/_maps/map_files/EventStructures/thunderdome_catwalk_chasm_fake.dmm b/_maps/map_files/EventStructures/thunderdome_catwalk_chasm_fake.dmm
index 355edebc9a5..4d7a9003444 100644
--- a/_maps/map_files/EventStructures/thunderdome_catwalk_chasm_fake.dmm
+++ b/_maps/map_files/EventStructures/thunderdome_catwalk_chasm_fake.dmm
@@ -1,6 +1,6 @@
 //MAP CONVERTED BY dmm2tgm.py THIS HEADER COMMENT PREVENTS RECONVERSION, DO NOT REMOVE
 "E" = (
-/turf/simulated/floor/chasm/straight_down,
+/turf/simulated/floor/chasm/straight_down/lava_land_surface/normal_air,
 /area/tdome/arena)
 "R" = (
 /turf/simulated/floor/catwalk,
diff --git a/_maps/map_files/EventStructures/thunderdome_hiero_default.dmm b/_maps/map_files/EventStructures/thunderdome_hiero_default.dmm
index 1a737210581..61dba42711b 100644
--- a/_maps/map_files/EventStructures/thunderdome_hiero_default.dmm
+++ b/_maps/map_files/EventStructures/thunderdome_hiero_default.dmm
@@ -3,10 +3,10 @@
 /turf/simulated/wall/indestructible/hierophant,
 /area/tdome/arena)
 "I" = (
-/turf/simulated/floor/indestructible/hierophant/two,
+/turf/simulated/floor/indestructible/hierophant/two/normal_air,
 /area/tdome/arena)
 "R" = (
-/turf/simulated/floor/indestructible/hierophant,
+/turf/simulated/floor/indestructible/hierophant/normal_air,
 /area/tdome/arena)
 
 (1,1,1) = {"
diff --git a/_maps/map_files/EventStructures/thunderdome_hiero_pandora.dmm b/_maps/map_files/EventStructures/thunderdome_hiero_pandora.dmm
index 9c02028c33b..ca9c8f43d28 100644
--- a/_maps/map_files/EventStructures/thunderdome_hiero_pandora.dmm
+++ b/_maps/map_files/EventStructures/thunderdome_hiero_pandora.dmm
@@ -1,16 +1,16 @@
 //MAP CONVERTED BY dmm2tgm.py THIS HEADER COMMENT PREVENTS RECONVERSION, DO NOT REMOVE
 "h" = (
 /mob/living/simple_animal/hostile/asteroid/elite/pandora,
-/turf/simulated/floor/indestructible/hierophant/two,
+/turf/simulated/floor/indestructible/hierophant/two/normal_air,
+/area/tdome/arena)
+"m" = (
+/turf/simulated/floor/indestructible/hierophant/two/normal_air,
 /area/tdome/arena)
 "F" = (
 /turf/simulated/wall/indestructible/hierophant,
 /area/tdome/arena)
-"I" = (
-/turf/simulated/floor/indestructible/hierophant/two,
-/area/tdome/arena)
 "R" = (
-/turf/simulated/floor/indestructible/hierophant,
+/turf/simulated/floor/indestructible/hierophant/normal_air,
 /area/tdome/arena)
 
 (1,1,1) = {"
@@ -19,7 +19,7 @@ R
 R
 R
 R
-R
+m
 R
 "}
 (2,1,1) = {"
@@ -43,81 +43,81 @@ R
 (4,1,1) = {"
 R
 R
-I
-I
-I
+m
+m
+m
 R
 R
 "}
 (5,1,1) = {"
 R
 R
-I
-I
-I
+m
+m
+m
 R
 R
 "}
 (6,1,1) = {"
 R
-I
-I
-I
-I
-I
+m
+m
+m
+m
+m
 R
 "}
 (7,1,1) = {"
 R
-I
-I
-I
-I
-I
+m
+m
+m
+m
+m
 R
 "}
 (8,1,1) = {"
 F
 F
-I
+m
 h
-I
+m
 F
 F
 "}
 (9,1,1) = {"
 R
-I
-I
-I
-I
-I
+m
+m
+m
+m
+m
 R
 "}
 (10,1,1) = {"
 R
-I
-I
-I
-I
-I
+m
+m
+m
+m
+m
 R
 "}
 (11,1,1) = {"
 R
 R
-I
-I
-I
+m
+m
+m
 R
 R
 "}
 (12,1,1) = {"
 R
 R
-I
-I
-I
+m
+m
+m
 R
 R
 "}
diff --git a/code/game/turfs/simulated/floor/indestructible.dm b/code/game/turfs/simulated/floor/indestructible.dm
index 4b0d28d8d21..5eaf1b65af3 100644
--- a/code/game/turfs/simulated/floor/indestructible.dm
+++ b/code/game/turfs/simulated/floor/indestructible.dm
@@ -59,10 +59,12 @@
 	if(prob(12))
 		icon_state = "necro[rand(2,3)]"
 
-/turf/simulated/floor/indestructible/necropolis/air
+/turf/simulated/floor/indestructible/necropolis/normal_air
 	oxygen = MOLES_O2STANDARD
 	nitrogen = MOLES_N2STANDARD
 	temperature = T20C
+	atmos_mode = ATMOS_MODE_SEALED
+	atmos_environment = null
 
 /// you put stone tiles on this and use it as a base
 /turf/simulated/floor/indestructible/boss
@@ -76,10 +78,12 @@
 	atmos_mode = ATMOS_MODE_EXPOSED_TO_ENVIRONMENT
 	atmos_environment = ENVIRONMENT_LAVALAND
 
-/turf/simulated/floor/indestructible/boss/air
+/turf/simulated/floor/indestructible/boss/normal_air
 	oxygen = MOLES_O2STANDARD
 	nitrogen = MOLES_N2STANDARD
 	temperature = T20C
+	atmos_mode = ATMOS_MODE_SEALED
+	atmos_environment = null
 
 /turf/simulated/floor/indestructible/hierophant
 	name = "floor"
@@ -92,7 +96,21 @@
 	atmos_environment = ENVIRONMENT_LAVALAND
 	smoothing_flags = SMOOTH_CORNERS
 
+/turf/simulated/floor/indestructible/hierophant/normal_air
+	oxygen = MOLES_O2STANDARD
+	nitrogen = MOLES_N2STANDARD
+	temperature = T20C
+	atmos_mode = ATMOS_MODE_SEALED
+	atmos_environment = null
+
 /turf/simulated/floor/indestructible/hierophant/get_smooth_underlay_icon(mutable_appearance/underlay_appearance, turf/asking_turf, adjacency_dir)
 	return FALSE
 
 /turf/simulated/floor/indestructible/hierophant/two
+
+/turf/simulated/floor/indestructible/hierophant/two/normal_air
+	oxygen = MOLES_O2STANDARD
+	nitrogen = MOLES_N2STANDARD
+	temperature = T20C
+	atmos_mode = ATMOS_MODE_SEALED
+	atmos_environment = null
diff --git a/code/game/turfs/simulated/floor/lava.dm b/code/game/turfs/simulated/floor/lava.dm
index 6a633d180bc..fd745495356 100644
--- a/code/game/turfs/simulated/floor/lava.dm
+++ b/code/game/turfs/simulated/floor/lava.dm
@@ -263,6 +263,13 @@
 	atmos_mode = ATMOS_MODE_EXPOSED_TO_ENVIRONMENT
 	atmos_environment = ENVIRONMENT_LAVALAND
 
+/turf/simulated/floor/lava/mapping_lava/normal_air
+	oxygen = MOLES_O2STANDARD
+	nitrogen = MOLES_N2STANDARD
+	temperature = T20C
+	atmos_mode = ATMOS_MODE_SEALED
+	atmos_environment = null
+
 /turf/simulated/floor/lava/mapping_lava/Initialize(mapload)
 	. = ..()
 	return INITIALIZE_HINT_LATELOAD //Lateload is needed, otherwise atmos does not setup right on the turf roundstart, leading it to be vacume. This is bad.