I am trying to make a monster farm and I’m worndering if there is a certain distance needed between spawners
Minecraft – How close can I make different monster spawners to be able to work
minecraft-java-edition
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To test this, I built a tower over some spawners and stayed directly over them about 15-20 blocks higher than they are.
As you can see, the flames have disappeared (and the spawners quit spinning, but you can't tell that from a picture), indicating that they are no longer spawning, despite me being directly over them.
So yes, it does take into account vertical distance.
The same rules apply to Monster Spawners as to the natural spawning of the mob in question, with two exceptions:
- Ordinarily, hostile mobs will never spawn next to the player, but with spawners they can.
- Natural spawns require ground underneath the mob, but Monster Spawners can create monsters in midair.
It is also important to understand the effect of light level: what is relevant is not the light at the spawner but the light at the location where the mob spawns, so putting a torch on the spawner is just a way to center the light, not inherently good — and is in fact inadequate to light up the full spawning range to level 8, though it happens to be sufficient for many natural dungeons. The actual requirement for safety is that the full spawning area (8×8 × 3 high box centered on the spawner's low-coordinate corner) is sufficiently lit (or does not have valid locations to spawn, e.g. is filled solid).
In your case, where you have two spawners right next to each other, there is no way to spawn just the skeletons except by lighting or filling up with blocks the entire spawn volume of the cave spider spawner, leaving you with just a thin slice of skeleton spawner volume (which will therefore have lower spawning rates).
Another possibility would be to construct a sorting system which separates the skeletons from the cave spiders, but I don't know of a particular design to suggest. Cave spiders are particularly difficult to handle because of their small size and ability to climb.
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Best Answer
Mob spawners activate when within 16 blocks (sphere) from the player. Any number of them within that range will work, with the obvious caveat that the spawner itself is not a spawnable space - the mobs need empty volume to spawn. The more spawners you put within the 9x9x3 volume centered on a spawner, the less empty space for mobs to spawn within the volume you have left.
But finding more than two spawners within 31 blocks from each other (so there's a location between them where the player activates both) is quite rare, so it's not a big worry.
On the other hand, if you plan a general mob farm, you'll be better off with a natural spawning based mob grinder than the spawners. Spawners only spawn up to 4 mobs every 25 seconds on the average (between 10s and 40s random cooldown) and only of the type the spawner is, while a good general mob farm will spawn all, or at least most kinds of mobs and its speed is limited only by your ability to kill them fast enough to keep the number below mob cap.