Talk:Spawn/Archive 1

Multiplayer Spawn
The article notes a 13 tile border, but later states the total protected area is 33x33. If there were a 13 block border around a 20x20 space this would give a protected area of 46x46, or with a 33x33 protected area the border would only be 6.5 tiles. Which number is wrong? --sirdrault 17:38, 14 March 2011 (CST)
 * I've never played multiplayer but a 6.5-block border would be kinda awkward. I'm going to assume the editor forgot he needed to add 13 twice. Alphap 22:09, 15 March 2011 (UTC)

As of 1.5_01, I can confirm that the protected area around the spawn is indeed 33x33. Additionally, there is a bug that allows you to place a block inside the protected zone when you're not an op: Place a block against a block that is outside the zone, and it is allowed. --coldelectrons

Spawn block
Is there an actual spawn block or do you spawn inbetween blocks? When I used the Compass, it would point in between 4 blocks instead of right in the center of one, but I cannot be sure based on this --Kris159 18:11, 16 November 2010 (UTC)
 * Based on where you stand after a spawn, there is an actual spawn point. The compass points to the northwest corner of your spawn block. I don't intend to sound catty, but that information is on the compass page which you linked to! JohnnyMadhouse 16:53, 16 November 2010 (CST)
 * Whoops, I didn't notice that bit when I read it. Northeast corner, do you mean >.< --Kris159 14:50, 18 November 2010 (CST)

Can mobs spawn areas that I build?
So basicly, that's my question. If I build my self a fortress and I leave it unlit and unguarded, will eventually mobs spawn into it and infest it, if I stay inside the boundaries that they can spawn? Vvp 21:00, 17 November 2010 (UTC)
 * Yeah. Those bad creatures will spawn any where that is unlit. --Scykei 02:11, 19 November 2010 (UTC)

One exception. If the ENTIRE floor is made of glass, or half-blocks (slabs/steps), baddies will not spawn :) Calinou 19:48, 23 March 2011 (UTC)


 * Which is a big waste of time. Torches work a lot better. Lol R ocĸetor talk  20:22, 28 March 2011 (UTC)

x=0,y=0,z=0?
What does this mean? If I look at a level.dat using LolEditor it says the Y spawn point is 64, and the X and Z ones are pretty much random. Is the 0,0,0 thing a hangover from a previous version of Minecraft and no longer correct? --DannyF1966 15:29, 24 December 2010 (UTC) Those are your coordinates, Y=How high you are, between 0 and 5 is bedrock. X and Z are the length and with coordinates. You can see those when you press F3 (No mod needed).--Jippiedoe 21:27, 16 March 2011 (UTC)

Spawn on Sand?
Can anyone confirm this? I spawn on dirt and stone all the time. Dragon of Fate 15:50, 15 January 2011 (UTC)


 * Update I'm in the process of testing it. Hopefully I'll finish this weekend. Pludrpladr 22:09 3 Febuary 2011 (CET)
 * Can this be confirmed? What were the results of this test? (If no-one responds in an hour, I'll check myself.) Darkid 23:40, 15 March 2011 (UTC)

In Single player, you always spawn in sand, this sand may be underground.. You may spawn underground then, rarely. In multiplayer, you can spawn on any block. You may find yourself in 1 block water depth (not 2 or more), or even on a tree. Calinou 22:49, 24 March 2011 (UTC)

I can confirm that this is false in 1.3. You sometimes spawn on grass. --Euryleia 16:51, 24 March 2011 (UTC)
 * Are there any other possible spawn locations? Stone, etc? Diamond, for obvious reasons, is (probably) not spawnable upon. Maybe with the right map, though. Darkid 20:18, 24 March 2011 (UTC)


 * Game only attempts to spawn you near sea level, don't expect to see diamond at spawn. Calinou 22:49, 24 March 2011 (UTC)
 * Well it's possible to be above a massive cave system, right? Surface caves and all? And spawn moves vertically by default, I believe. Might take some reverse-engineering of the randomness. Darkid 00:01, 25 March 2011 (UTC)


 * In the seed 'gargamel' you spawn on stone underground in a cave system. Hwever most worlds spawn on sand. I hate that! Now I can't spawn inside me house. R ocĸetor talk  20:25, 28 March 2011 (UTC)

the ultimate paradise
i found this awesome island but it was extremely far away from my spawn point and after a while (as normal) i died and i could not remember where that island was it was chock full of diamond and steel. do you think that there will ever be a way to make a movable spawn area in-game.


 * Yes, it's speculated beds will be them.--Jippiedoe 21:27, 16 March 2011 (UTC)
 * It's nearly here: 1.4!Darkid 00:18, 25 March 2011 (UTC)


 * Yes! I can't wait for it! R ocĸetor talk  20:26, 28 March 2011 (UTC)

Enemy Mobs

 * Have not been able to spawn on Sandstone. Can someone else confirm my finding? If this is the case, it's the first opaque block that mobs will not spawn on. - Goose 19:06, 18 January 2011 (UTC)

That could be the reason my loot generator isn't working... I'll try what happens if I use cobblestone floors.--Jippiedoe 21:27, 16 March 2011 (UTC)

Actually, I built my house out of sandstone and monsters spawn up there, as I have not lit it. I am not sure they are spawning on the dirt up there or the sandstone. Stinkbug22 20:17, 28 March 2011 (UTC)

Monsters (aggressive) spawn on everything except half blocks (slabs) and glass/ice and mid-air. This has already been proven. NB: I tried it myself. Kay, hope I solved this. R ocĸetor talk  20:21, 28 March 2011 (UTC)

Top of the Map
I have not seen neutral or hostile mobs spawn on blocks (grass and dirt specifically) at the upper limit of the map in Beta 1.3_01 Multiplayer. Can anyone confirm this for dirt or other blocks? Islandre 00:01 13 March 2011 (GMT)
 * This may be due to the algorythm of spawning based on layers... It's possible notch never added an upper bound to the algorithm, meaning that at levels of ~100 mobs require light level <0 to spawn.

I thought he removed that... --Jippiedoe 21:27, 16 March 2011 (UTC)

I thought it might have been because the space above the top blocks isn't in a chunk? In the Mob Spawning Science external link it says "Individual Spawn Loop: 8) Check that current L(i) is unoccupied, has spawnable ground below, and an empty space above. 9) If check fails, get next L(i) and go back to 8)."

Is the empty space above the top blocks empty spaces (blocks) or is it just space? Also this article is quite old, not sure if this is still how things work. Islandre 18:04 23 March 2011 (GMT)

They can't at layer 127-128, top of the map... Calinou 19:53, 23 March 2011 (UTC)

Monsters and Peaceful
In the Difficulty section of this wiki, it says that Monsters CAN spawn on peaceful, although they shall be removed immediately. In this page, it says that monsters CANNOT spawn on peaceful. The wiki is contradicting itself. If I get more support I'll change whichever one, or someone else may. Stinkbug22 20:16, 28 March 2011 (UTC)


 * Monsters (aggressive) DO spawn on Peaceful, and that is a fact. However, they are all removed instantaneously from the game, EXCEPT Slimes. In The Nether, Zombie Pigmen and Ghasts DO spawn, but they are instantaneously removed as well. Hope this helped. R ocĸetor talk  20:18, 28 March 2011 (UTC)

The code has been modified so you won't see ghost mobs or sounds, in 1.2_01.

Updated Spawning Science?
The info in this page, as well as the external link, point to the old mob spawning science thread, which states at the very top of the OP that it refers to how spawning science worked prior to the Halloween update. I remember seeing a newer thread on the forum, but I can't seem to find it. Anyone subscribed to it or able to remember the thread title? >.< Genshou 17:33, 15 April 2011 (UTC)

OP and others discuss the updates later in the same thread. Not sure if it's fully up to date now. Islandre 23:52, 18 April 2011 (GMT)
 * Here is the thread I found: http://www.minecraftforum.net/viewtopic.php?f=1020&t=117374
 * On pg. 2 are some density maps that show spawning/despawning over a 10-hour (36,384 second) period on a flat map. There's another thread I read that has a bit more scientific explanation of exactly how mob spawning is sorted procedurally: http://www.minecraftforum.net/viewtopic.php?f=1020&t=147976


 * I think the spawning page could use some updates, since it's been out of date as of Halloween. If I don't get to it early on in this upcoming week, feel free to remind me via my user talk page ;D (Genshou 05:35, 15 May 2011 (UTC))

Mobs in caves
Mobs spawn in the 144 x 144 area around the player, but what about the height? If the player is on the surface, will monsters spawn in the caves underground? Does it matter how deep (or high) they are? --Joshua Issac 04:37, 26 April 2011 (UTC)
 * Pretty sure it doesn't. Mobs seem to spawn at all altitudes within that 144x144 area. - Alphap T ~ C 05:25, 26 April 2011 (UTC)

Spawn Point Changed
I have a second base very far from my first that I reached without generating the chunks in between by travelling through the Nether. I rested in a bed in this second base, then moved the bed and died. I spawned in a new location near this second base instead of my original spawn point near the first base.

Passive mob limit
I think the limit is higher than 15. Reasoning being that you can have a pack of up to 20 wolves before monster spawning stops. Nosrepa 03:20, 21 May 2011 (UTC)

I think the limit is around 30 personally, at least in SMP. I tried the //butcher command many times (I said this above maybe :P), it says "Killed 26 mobs." Sometimes 27 or 28. Unfortunately I can't read the code. C ali nou - talk × contribs » 08:04, 21 May 2011 (UTC)

I talked to tramsam in IRC and he said the limit is still 15, but that squids do not count towards that limit. There also could be an exception for chickens, as you can spawn those yourself via eggs Nosrepa 05:57, 23 May 2011 (UTC)

sunlight needed?
Passive mobs spawn on grass blocks with light level >9, right? Does that light HAVE to be from the sun, or can passive mobs spawn inside buildings if there is grass and light? And if it DOES need to be open to the sun, do glass roofs count?Wandergirl108 03:12, 22 June 2011 (UTC)
 * It does not need to be sunlight. A light from torches, glowstone, burning netherrack is fine. --MiiNiPaa 06:22, 16 July 2011 (UTC)

Spawn sphere or box?
Do mobs not spawn/despawn in a box shape or a sphere shape around you (ie, spawn outside of a 24x24x24 box or outside of a radius 24 sphere)? The answer to this should be added to the article. -speaker


 * Mobs spawn within a sphere around the player, not a box. 「 ダイノ ガイ 千？！ 」? · ☎ Dinoguy1000 00:09, 17 July 2011 (UTC)

Air or non-colidable?
Can mobs only spawn in air blocks that are truely empty, or can they spawn in non colidable blocks like ladders or redstone dust? J N Cressey 14:18, 30 July 2011 (UTC)
 * Dunno, no idea... Should be tested, I will if I happen to have enough time soon... | TheKax |   Talk   15:42, 7 August 2011 (UTC)
 * They can spawn above both redstone dust and pressure plates. I'm not sure about fences and ladders and the like, though I don't see why it'd be any different for those. 「 ダイノ ガイ 千？！ 」? · ☎ Dinoguy1000 21:05, 8 August 2011 (UTC)

Clarification on mobs spawning?
"Enemy mobs can spawn on any fully-opaque cube block with a light level of less than 7. [snip] They require a 2 block head room to spawn, although making the room higher and bigger increases their likelihood of spawning."

I've confirmed that slimes spawn in 1x1x1 areas, but they're rather glitchy in areas smaller than 3-4 blocks high (their bouncing makes them get stuck in the ceiling and jerk around a lot.) However, I'm confused by the definition of head room and opacity.

Specifically, as long as the block itself is solid that they spawn on, and there is adequate headroom, will water, signs, etc. affect mob spawning? They're considered transparent blocks, so would they count as "head room"?

Essentially, is it possible to make a completely submerged chamber that mobs will spawn inside of (and properly drown?) Or is water not considered transparent enough for them to spawn inside?

Also curious about how making a room higher increases spawn rate. For example, just to get the maximum number of mobs, wouldn't a series of x*4*z rooms stacked on top of each other (say, 10 such rooms) generate more mobs than a single x*40*z room? Mitschu 11:34, 31 July 2011 (UTC)


 * Mobs have to have opaque blocks to spawn on, but other, non-opaque blocks can be on top of them as long as they are non-solid (e.g. redstone or pressure plates), with the exception of liquids. I'm not sure about forcing the liquid to be suspended one block above the opaque floor (e.g. by having pressure plates, signs, etc. directly on the floor and then the liquid on the pressure plates, signs, etc.), or having solid, non-opaque blocks (such as stairs or glass blocks) one block above the floor (having the floor, and one layer of empty or non-solid blocks, and then the solid, non-opaque blocks), but non-opaque, non-solid, non-liquid blocks shouldn't affect spawning AFAIK.
 * Headroom just refers to the total empty space above the floor. Since tall mobs are two blocks high (maybe a bit less, not that it matters), they require a space of at least two blocks between the floor and ceiling (these blocks can be totally empty, or have non-solid blocks) to spawn in. Slimes are the exception to this, since, as you noted, they can spawn in a 1x1x1-block space, though it causes trouble for them. Slimes can actually suffocate after spawning if the area isn't tall enough for that size slime.
 * I have no idea how room height is supposed to relate to mob spawn rate, or whether multiple, smaller rooms are better than one larger room. AFAIK, the best way to up the spawn rate in a mob spawner is to light up caves in the area (and the surface, if you're that devoted to improving the spawner's performance) - this is guaranteed to work, and quantifiably so, unlike increasing the size of the mob spawner. 「 ダイノ ガイ 千？！ 」? · ☎ Dinoguy1000 03:41, 2 August 2011 (UTC)

Slimes need two non-opaque blocks on top of an opaque block to spawn, just like all other mobs (except squid). What's unique about slimes is that no collision check is done after checking the blocks. Other mobs need the three blocks and no collision. Slimes just need the blocks. This is why they can spawn inside solid objects in some cases. Slimes can't spawn in a 1x1x1 space, unless the block above is non-opaque, like glass. --Last username 11:19, 15 September 2011 (UTC)

NO Animals Mod?
Okay, this technically isn't a mod, but I was wondering if not updating can result in NOTHING spawning, anywhere, day or night (with the exceptions of tame wolves respawning nearby and monster spawners spewing monsters)? 'Cuz that's been happening in my world a lot lately, and I want to know if it has something to do with the fact that I haven't updated from 1.6.5 or if it's a glitch caused by something else. It gets fixed if I exit and re-enter my world, but it tends to happen again after a while, and it seems like it's taking less and less time to do so. Any ideas? Wandergirl108 10:26, 2 August 2011 (UTC)


 * That doesn't sound like an update issue. There is a cap on the limit of peaceful mobs, so if there is an area where they are gathered it can prevent animals from spawning in other places.  Exiting and re-entering resets the spawns (or so I think - I could be wrong), and so allows more to spawn.  That could be the issue you are having.  Verhalthur (talk)(contribs) 13:59, 2 August 2011 (UTC)
 * Tamed Wolves count as "peaceful" animals and will prevent other animals from spawning. Since there can only be ~15 peaceful animals up at once (I believe), you don't need many wolves to screw up spawning.  --Warlock 14:20, 2 August 2011 (UTC)

Okay, first of all, I have ONE wolf, and second of all, MONSTERS AREN'T SPAWNING EITHER! And I press F3 to check for mob ID #'s, and I come up with zilch, except for my ONE wolf, squid, and monsters that are coming out of monster spawners if there are any. Whew...sorry about the confusion; I was trying to make an interesting title based on an allusion to the Mo' Animals Mod...my bad... Wandergirl108 17:19, 2 August 2011 (UTC)
 * Squids count as passive mobs too and sometimes don't despawn (at least in multiplayer). Go kill some and see if animals start spawning maybe? --Warlock 17:40, 2 August 2011 (UTC)

Oh, for...MONSTERS AREN'T SPAWNING EITHER!!!!!!!!! There are NO hostile mobs ANYWHERE when this happens!!!! And I am NOT playing on peaceful!!!Wandergirl108 08:30, 3 August 2011 (UTC)


 * If you have a completely unmodified 1.6.5, I can try to replicate the issue if you post a save. I'm actually kind of curious as to why this is happening.  Verhalthur (talk)(contribs) 13:16, 3 August 2011 (UTC)

Yes, my world is completely unedited, but I don't know how to post a save...that, and it's technically not my account... :3 Wandergirl108 18:55, 3 August 2011 (UTC)


 * Don't worry about the account thing, that shouldn't affect uploading the save.
 * To upload the save, open up a Windows Explorer window and type without the quotes "%appdata%" and you should see a folder called ".minecraft" There will be a "saves" folder which should contain the folder of the save itself. Once you've determined which folder is the right one by the name, you can make a .zip folder and drag the save into it.
 * Then, just upload that with a filesharing site, and you should be set! Verhalthur (talk)(contribs) 19:05, 3 August 2011 (UTC)

I'm actually really not comfortable sharing my world; however, I think I may know what's going on. I'm not sure if this is the ROOT cause of the problem, but...well, you see, I'm trying to build a fast minecart track to the Far Lands that's 10% powered rail, and whenever I go to one end of it or the other (and thus cause the used memory space to go way past 50%), everything stops spawning. So I figure, maybe stuff just stops spawning when the used memory space exceeds a certain percentage. Does that sound likely?Wandergirl108 16:34, 4 August 2011 (UTC) Also, I just found a dungeon while this was happening - the spiders spawned like normal, but I checked the ID #'s, and they weren't in sequence, just like they wouldn't be normally. That tells me that Minecraft THINKS it's still generating mobs when this happens, even though it's not. So, maybe it's an overload thing?Wandergirl108 17:25, 4 August 2011 (UTC)


 * I don't know if any of you watch Etho's Lab, but he's experienced the same issue. It happens for him if he spends too long in the same region (512x512-block area), and is fixed by travelling well outside that region (so that all of its chunks are unloaded from memory) and allowing mobs to spawn in the other region for a while. This assumes, of course, that mobs aren't spawning for you and you're not leaving the region you're in; if you aren't getting any mob spawning, regardless of where/how far you go or how long you wait, you've got something else going on and I don't know how to help.
 * (before you ask, you can find region boundaries by finding multiples of 512 in the X and Z coordinates (so, for example, (0,0) is a region corner, as are (0,512), (512,0), (0,-512), and (-512,0), and so on). 「 ダイノ ガイ 千？！ 」? · ☎ Dinoguy1000 20:56, 4 August 2011 (UTC)


 * I have a similar issue. No passive mobs spawning and I only play vanilla (no mods). I think this is preparation for animal persistence but I'm not sure. --AntonImaus 11:59, 5 August 2011 (UTC)


 * Post a save for us to replicate. And also, try to delete your "version"-file (maybe minecraft.jar too) and let the launcher redownload it, that may fix it. | TheKax |   Talk   13:14, 5 August 2011 (UTC)