Adds some neat tiles and walls for use on lavaland

code/__DEFINES/layers.dm

@@ -14,6 +14,7 @@
 #define CLOSED_TURF_LAYER 2.05
 #define ABOVE_NORMAL_TURF_LAYER 2.08
 #define LATTICE_LAYER 2.2
+#define OVER_LATTICE_LAYER 2.25
 #define DISPOSAL_PIPE_LAYER 2.3
 #define GAS_PIPE_HIDDEN_LAYER 2.35
 #define WIRE_LAYER 2.4

code/game/turfs/closed.dm

@@ -116,6 +116,23 @@
 	underlay_appearance.icon_state = "necro1"
 	return TRUE
 
+/turf/closed/indestructible/riveted/boss
+	name = "stone wall"
+	desc = "A thick, seemingly indestructible stone wall."
+	icon = 'icons/turf/walls/boss_wall.dmi'
+	icon_state = "wall"
+	explosion_block = 50
+	baseturf = /turf/closed/indestructible/riveted/boss
+
+/turf/closed/indestructible/riveted/boss/hot
+	icon = 'icons/turf/walls/boss_wall_hot.dmi'
+	baseturf = /turf/closed/indestructible/riveted/boss/hot
+
+/turf/closed/indestructible/riveted/boss/get_smooth_underlay_icon(mutable_appearance/underlay_appearance, turf/asking_turf, adjacency_dir)
+	underlay_appearance.icon = 'icons/turf/floors.dmi'
+	underlay_appearance.icon_state = "basalt"
+	return TRUE
+
 /turf/closed/indestructible/riveted/hierophant
 	name = "wall"
 	desc = "A wall made out of a strange metal. The squares on it pulse in a predictable pattern."

code/game/turfs/simulated/chasm.dm

@@ -54,8 +54,16 @@
 		else
 			to_chat(user, "<span class='warning'>The plating is going to need some support! Place metal rods first.</span>")
 
+/turf/open/chasm/proc/is_safe()
+	//if anything matching this typecache is found in the chasm, we don't drop things
+	var/static/list/chasm_safeties_typecache = typecacheof(list(/obj/structure/lattice/catwalk, /obj/structure/stone_tile))
+	var/list/found_safeties = typecache_filter_list(contents, chasm_safeties_typecache)
+	return LAZYLEN(found_safeties)
+
 /turf/open/chasm/proc/drop_stuff(AM)
 	. = 0
+	if(is_safe())
+		return FALSE
 	var/thing_to_check = src
 	if(AM)
 		thing_to_check = list(AM)

code/game/turfs/simulated/floor/plating/lava.dm

@@ -54,7 +54,7 @@
 
 /turf/open/floor/plating/lava/proc/is_safe()
 	//if anything matching this typecache is found in the lava, we don't burn things
-	var/static/list/lava_safeties_typecache = typecacheof(list(/obj/structure/lattice/catwalk))
+	var/static/list/lava_safeties_typecache = typecacheof(list(/obj/structure/lattice/catwalk, /obj/structure/stone_tile))
 	var/list/found_safeties = typecache_filter_list(contents, lava_safeties_typecache)
 	return LAZYLEN(found_safeties)
 

code/modules/mining/shelters.dm

@@ -4,12 +4,14 @@
 	var/blacklisted_turfs
 	var/whitelisted_turfs
 	var/banned_areas
+	var/banned_objects
 
 /datum/map_template/shelter/New()
 	. = ..()
 	blacklisted_turfs = typecacheof(/turf/closed)
 	whitelisted_turfs = list()
 	banned_areas = typecacheof(/area/shuttle)
+	banned_objects = list()
 
 /datum/map_template/shelter/proc/check_deploy(turf/deploy_location)
 	var/affected = get_affected_turfs(deploy_location, centered=TRUE)
@@ -24,7 +26,7 @@
 			return SHELTER_DEPLOY_BAD_TURFS
 
 		for(var/obj/O in T)
-			if(O.density && O.anchored)
+			if((O.density && O.anchored) || is_type_in_typecache(O, banned_objects))
 				return SHELTER_DEPLOY_ANCHORED_OBJECTS
 	return SHELTER_DEPLOY_ALLOWED
 
@@ -40,7 +42,7 @@
 /datum/map_template/shelter/alpha/New()
 	. = ..()
 	whitelisted_turfs = typecacheof(/turf/closed/mineral)
-
+	banned_objects = typecacheof(/obj/structure/stone_tile)
 
 /datum/map_template/shelter/beta
 	name = "Shelter Beta"
@@ -55,3 +57,4 @@
 /datum/map_template/shelter/beta/New()
 	. = ..()
 	whitelisted_turfs = typecacheof(/turf/closed/mineral)
+	banned_objects = typecacheof(/obj/structure/stone_tile)

code/modules/ruins/objects_and_mobs/necropolis_gate.dm

@@ -60,3 +60,168 @@
 		. = ..()
 	else
 		return QDEL_HINT_LETMELIVE
+
+//stone tiles for boss arenas
+/obj/structure/stone_tile
+	name = "stone tile"
+	icon = 'icons/turf/boss_floors.dmi'
+	icon_state = "pristine_tile1"
+	layer = OVER_LATTICE_LAYER
+	resistance_flags = INDESTRUCTIBLE | LAVA_PROOF | FIRE_PROOF | UNACIDABLE | ACID_PROOF
+	var/tile_key = "pristine_tile"
+	var/tile_random_sprite_max = 24
+
+/obj/structure/stone_tile/Initialize(mapload)
+	. = ..()
+	icon_state = "[tile_key][rand(1, tile_random_sprite_max)]"
+
+/obj/structure/stone_tile/block
+	name = "stone block"
+	icon_state = "pristine_block1"
+	tile_key = "pristine_block"
+	tile_random_sprite_max = 4
+
+/obj/structure/stone_tile/slab
+	name = "stone slab"
+	icon_state = "pristine_slab1"
+	tile_key = "pristine_slab"
+	tile_random_sprite_max = 4
+
+/obj/structure/stone_tile/center
+	name = "stone center tile"
+	icon_state = "pristine_center1"
+	tile_key = "pristine_center"
+	tile_random_sprite_max = 4
+
+/obj/structure/stone_tile/surrounding
+	name = "stone surrounding slab"
+	icon_state = "pristine_surrounding1"
+	tile_key = "pristine_surrounding"
+	tile_random_sprite_max = 2
+
+/obj/structure/stone_tile/surrounding_tile
+	name = "stone surrounding tile"
+	icon_state = "pristine_surrounding_tile1"
+	tile_key = "pristine_surrounding_tile"
+	tile_random_sprite_max = 2
+
+//cracked stone tiles
+/obj/structure/stone_tile/cracked
+	name = "cracked stone tile"
+	icon_state = "cracked_tile1"
+	tile_key = "cracked_tile"
+
+/obj/structure/stone_tile/block/cracked
+	name = "cracked stone block"
+	icon_state = "cracked_block1"
+	tile_key = "cracked_block"
+
+/obj/structure/stone_tile/slab/cracked
+	name = "cracked stone slab"
+	icon_state = "cracked_slab1"
+	tile_key = "cracked_slab"
+	tile_random_sprite_max = 1
+
+/obj/structure/stone_tile/center/cracked
+	name = "cracked stone center tile"
+	icon_state = "cracked_center1"
+	tile_key = "cracked_center"
+
+/obj/structure/stone_tile/surrounding/cracked
+	name = "cracked stone surrounding slab"
+	icon_state = "cracked_surrounding1"
+	tile_key = "cracked_surrounding"
+	tile_random_sprite_max = 1
+
+/obj/structure/stone_tile/surrounding_tile/cracked
+	name = "cracked stone surrounding tile"
+	icon_state = "cracked_surrounding_tile1"
+	tile_key = "cracked_surrounding_tile"
+
+//burnt stone tiles
+/obj/structure/stone_tile/burnt
+	name = "burnt stone tile"
+	icon_state = "burnt_tile1"
+	tile_key = "burnt_tile"
+
+/obj/structure/stone_tile/block/burnt
+	name = "burnt stone block"
+	icon_state = "burnt_block1"
+	tile_key = "burnt_block"
+
+/obj/structure/stone_tile/slab/burnt
+	name = "burnt stone slab"
+	icon_state = "burnt_slab1"
+	tile_key = "burnt_slab"
+
+/obj/structure/stone_tile/center/burnt
+	name = "burnt stone center tile"
+	icon_state = "burnt_center1"
+	tile_key = "burnt_center"
+
+/obj/structure/stone_tile/surrounding/burnt
+	name = "burnt stone surrounding slab"
+	icon_state = "burnt_surrounding1"
+	tile_key = "burnt_surrounding"
+
+/obj/structure/stone_tile/surrounding_tile/burnt
+	name = "burnt stone surrounding tile"
+	icon_state = "burnt_surrounding_tile1"
+	tile_key = "burnt_surrounding_tile"
+
+//hot stone tiles, cosmetic only
+/obj/structure/stone_tile/hot
+	icon = 'icons/turf/boss_floors_hot.dmi'
+
+/obj/structure/stone_tile/block/hot
+	icon = 'icons/turf/boss_floors_hot.dmi'
+
+/obj/structure/stone_tile/slab/hot
+	icon = 'icons/turf/boss_floors_hot.dmi'
+
+/obj/structure/stone_tile/center/hot
+	icon = 'icons/turf/boss_floors_hot.dmi'
+
+/obj/structure/stone_tile/surrounding/hot
+	icon = 'icons/turf/boss_floors_hot.dmi'
+
+/obj/structure/stone_tile/surrounding_tile/hot
+	icon = 'icons/turf/boss_floors_hot.dmi'
+
+//hot cracked stone tiles, cosmetic only
+/obj/structure/stone_tile/cracked/hot
+	icon = 'icons/turf/boss_floors_hot.dmi'
+
+/obj/structure/stone_tile/block/cracked/hot
+	icon = 'icons/turf/boss_floors_hot.dmi'
+
+/obj/structure/stone_tile/slab/cracked/hot
+	icon = 'icons/turf/boss_floors_hot.dmi'
+
+/obj/structure/stone_tile/center/cracked/hot
+	icon = 'icons/turf/boss_floors_hot.dmi'
+
+/obj/structure/stone_tile/surrounding/cracked/hot
+	icon = 'icons/turf/boss_floors_hot.dmi'
+
+/obj/structure/stone_tile/surrounding_tile/cracked/hot
+	icon = 'icons/turf/boss_floors_hot.dmi'
+
+//hot burnt stone tiles, cosmetic only
+/obj/structure/stone_tile/burnt/hot
+	icon = 'icons/turf/boss_floors_hot.dmi'
+
+/obj/structure/stone_tile/block/burnt/hot
+	icon = 'icons/turf/boss_floors_hot.dmi'
+
+/obj/structure/stone_tile/slab/burnt/hot
+	icon = 'icons/turf/boss_floors_hot.dmi'
+
+/obj/structure/stone_tile/center/burnt/hot
+	icon = 'icons/turf/boss_floors_hot.dmi'
+
+/obj/structure/stone_tile/surrounding/burnt/hot
+	icon = 'icons/turf/boss_floors_hot.dmi'
+
+/obj/structure/stone_tile/surrounding_tile/burnt/hot
+	icon = 'icons/turf/boss_floors_hot.dmi'