So, placing your base underground would keep you safe from general mobs spawns. I've also read that zombies only spawn on the 'highest' block for a specific coordinate (outside a POI, of course). Items are not owned by players but allowed to be used on our servers as a service from us. All items in the primal rage gaming shop are for our time and consideration. So if you added to the entry for flagstoneBlock, then zombies would not spawn on those blocks. Welcome to our 7 Days Guild Store We have many items for you so please take your time. Note that, as I understand it, screamers are not bound by this rule (nor are the mobs they call), and POI sleeper spawning, as it works with a different mechanism, is also not bound by this rule. Further, if you remove this property (or set it to false) for those blocks where it is true, mobs will no longer spawn on that block type. I don't know specifically which blocks have this property set or not but you can look in the items.xml file to check (I think). We provide customers world wide with a quality state of art full service vending experience with the largest selection of vending machines including snack vending machines, cold soda-drink vendors, hot coffee machines, cold and frozen food vending equipment, bulk gumball & candy vendors. There is a property on blocks, player-placed or not, that allows non-POI, non-screamer spawns called canMobsSpawnOn. manufactures a full range of vending machines to meet all your vending needs. No, there is no prohibition on spawning on player-placed blocks.