Reworks the minimap cache system

If minimap generation is disabled, the system will now first try to load the map from its cache, and failing that, try to load it from backup minimap files
Also adds a config for space ruin budgets

code/controllers/configuration.dm

@@ -184,6 +184,7 @@
 	var/grey_assistants = 0
 
 	var/lavaland_budget = 60
+	var/space_budget = 16
 
 	var/aggressive_changelog = 0
 
@@ -620,6 +621,8 @@
 					config.grey_assistants			= 1
 				if("lavaland_budget")
 					config.lavaland_budget			= text2num(value)
+				if("space_budget")
+					config.space_budget			= text2num(value)
 				if("no_summon_guns")
 					config.no_summon_guns			= 1
 				if("no_summon_magic")

code/controllers/subsystem/mapping.dm

@@ -34,7 +34,7 @@ var/datum/subsystem/mapping/SSmapping
 			else
 				space_zlevels += i
 
-	seedRuins(space_zlevels, rand(8,16), /area/space, space_ruins_templates)
+	seedRuins(space_zlevels, config.space_budget, /area/space, space_ruins_templates)
 
 	// Set up Z-level transistions.
 	setup_map_transitions()

code/controllers/subsystem/minimap.dm

@@ -13,25 +13,44 @@ var/datum/subsystem/minimap/SSminimap
 	NEW_SS_GLOBAL(SSminimap)
 
 /datum/subsystem/minimap/Initialize(timeofday)
-	if(!config.generate_minimaps)
-		world << "Minimap generation disabled... Skipping"
-		return
 	var/hash = md5(file2text("_maps/[MAP_PATH]/[MAP_FILE]"))
-	if(hash == trim(file2text(hash_path())))
-		return ..()
-
-	for(var/z in z_levels)
-		generate(z)
-		register_asset("minimap_[z].png", fcopy_rsc(map_path(z)))
-	fdel(hash_path())
-	text2file(hash, hash_path())
+	if(config.generate_minimaps)
+		if(hash == trim(file2text(hash_path())))
+			world.log << "Hash check [hash]"
+			for(var/z in z_levels)	//We have these files cached, let's register them
+				register_asset("minimap_[z].png", fcopy_rsc(map_path(z)))
+			return ..()
+		for(var/z in z_levels)
+			generate(z)
+			register_asset("minimap_[z].png", fcopy_rsc(map_path(z)))
+		fdel(hash_path())
+		text2file(hash, hash_path())
+	else
+		world << "Minimap generation disabled. Loading from cache..."
+		var/fileloc = 0
+		if(hash == trim(file2text(hash_path())))//Let's see if we have a map cached that we can use
+			fileloc = 0
+		else
+			for(var/z in z_levels)
+				if(!isfile(file(map_path(z,1))))	//Let's make sure we have a backup file for this map.
+					world << "Failed to load backup minimap file on zlevel [z]. Aborting"	//We couldn't find something. Bail to prevent issues with null files
+					return
+				fileloc = 1	//No map image cached with the current map, and we have a backup. Let's fall back to it.
+		for(var/z in z_levels)
+			register_asset("minimap_[z].png", fcopy_rsc(map_path(z,fileloc)))
 	..()
 
-/datum/subsystem/minimap/proc/hash_path()
-	return "data/minimaps/[MAP_NAME].md5"
+/datum/subsystem/minimap/proc/hash_path(backup)
+	if(backup)
+		return "icons/minimaps/[MAP_NAME].md5"
+	else
+		return "data/minimaps/[MAP_NAME].md5"
 
-/datum/subsystem/minimap/proc/map_path(z)
-	return "data/minimaps/[MAP_NAME]_[z].png"
+/datum/subsystem/minimap/proc/map_path(z,backup)
+	if(backup)
+		return "icons/minimaps/[MAP_NAME]_[z].png"
+	else
+		return "data/minimaps/[MAP_NAME]_[z].png"
 
 /datum/subsystem/minimap/proc/send(client/client)
 	for(var/z in z_levels)