The Land Claim Block (LCB) is now used in both multiplayer and singleplayer. Most notably, user-crafted workstations (workbenches, cement mixers, forges, etc) need to be within the realm of a placed LCB in order to be removed. Hitting it with a wrench or other tool will just destroy it.

The question: If I put multiple LCBs down (multiple bases, etc), I know that only the most recent LCB placed affects the workstations (I've already experienced this and had to put down a new LCB in order to move my forges to another location) but if I leave LCBs in place in an old base, placing a new one elsewhere, will the original LCB prevent zombie spawns in that area?

TL;DR:I'm building an underground tunnel system between parts of my base, which spans more than the 41x41 space that a single LCB affects, so if I put multiple LCBs down in various areas, can I effectively prevent all zombie spawning inside my bases?

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3 Answers

Research shows that LCB doesn't stop spawning. There isn't anything super conclusive, but it looks like the following stops spawning:

  • Your bedroll (41x41 area by default)
  • Player made "building blocks" (specific types of things classify)

There isn't any mention of LCB stopping spawning.

On top of that, certain types of spawning are not affected, like Sleeper in POI. If you build an existing POI into your base, some respawns may not be preventable.

Sources:

March 2016 reddit post

A16 release notes

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No, there is no prohibition on spawning on player-placed blocks. There is a property on blocks, player-placed or not, that allows non-POI, non-screamer spawns called canMobsSpawnOn. 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). 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. 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.

So if you added < property name='canMobsSpawnOn' value='false' /> to the entry for flagstoneBlock, then zombies would not spawn on those blocks. I've also read that zombies only spawn on the 'highest' block for a specific coordinate (outside a POI, of course). So, placing your base underground would keep you safe from general mobs spawns. I expect that will change pretty soon.

LCB does prevent zombie respawn. Multiple LCBs do not change this. It is now possible, in A18, to build a larger defensible position, including building with an existing POI because the LCB will prevent all respawns (including loot) within the boundary of that block.