[2] Slime Chunk: world generation makes 1/10 chunks (a 16x16 block) a slime chunk, meaning that below layer 40 slimes will spawn there regardless of light level. 1. json spawn rules that was created to fix MCPE-153502 has multiple mistakes that break parity with Java Edition: It allows slimes to spawn at Y = 40 and Y = 41. 17) on the chunkbase. If you're adding floors inside the pyramid, the slimes will stop being an issue once you're above height. " Once those chunks are loaded, slimes can spawn anywhere from level 0 to level 10. Slimes are shy – they won’t spawn if other mobs are nearby. 4 and the world is kinda corrupted) but no slimes are corrupting. I have explored a swamp biome a lot (not during a new moon) and also I have dug out an area of 4 chunks and according to AMIDST, 3 of them are slime chunks. I have lighted up whole 40x40 area, setup is at y=26; Loaded Mobs are on minimum (around 4 mobs loaded). Slime chunks are specific chunks of a Minecraft world, where slimes can spawn underground. I am unable to get slimes to spawn in a slime chunks. Plus all the information on sl. “Apart from spawning in swamps (added in 1. Make a big dark room below where you don't want them to spawn, or you could. 17 survival world after I used chunk base (seed breakdown tool) to find a slime chunk. Since we started a new world on my server, only one slime has spawned in a swamp. go into a creative world find another slime chunk and quickly build up a platform and see if they/anything will spawn, make sure it is a different biome as well basically, trying to figure out if there is something nearby that effects it, or the specific area, or is. 2) check the light level inside your farm, slimes can spawn in any light level (if this is a slime chunk). Follow. Do /kill @e[type=minecraft:slime] to kill all slimes. No slimes ever spawned. Go underground until you arrive at Y40, then dig a 20-block-deep 16x16 chamber. That said, slimes also require slimy grass to spawn, so if you removed. This is why I'm asking if string will stop slime spawns. Find a dark spot. So, you stand in. 19. my45acp1911. I have my chunk under Y:40 and I'm positive that it's in a slime chunk. If you have any idea, please tell me. Swamp farms are a bit faster than slime chunk farms. 1)The ceiling above your spawning platform need to be at least 3 blocks height. " Im playing on a smp server, difficulty hard. We. – spund3 Feb 6, 2016 at 10:15 1 @spund3 Slimes in slime chunks at y<40 ignore light levels completely. I use a third party software to detect where slime chunks are on a given seed and when i put in my seed and found the chunk and clear it away to make a farm no slimes would spawn. The rates will be better, and you'll get resources for it too. As slimes can generate in any light level, ensure to light up. . g. After a couple of days I decided to start a slime farm. Share. I stayed several nights at swamps and saw no. ago. 3) you can find the list of non-spawnable blocks and items placed. Mark the Borders: With the borders visible, outline each chunk using fences or another distinctive block. – spund3 Feb 6, 2016 at 10:15 1 @spund3 Slimes in slime chunks at y<40 ignore light levels. Slimes can only spawn in designated "slime-chunks. Although this doesn't stop slime from spawning, it at least. Slimes don’t need darkness or spawn so put down just enough torches to prevent other mobs from spawning, and light up any other cave. " ~~~ MinecraftWiki article on Slimes. 15. Slimes can spawn all the way from y=40 to bedrock, and you only need a 3 block tall vertical height per spawning pad. I didn't dig up all the hole, but at least 25 levels. Slime is a rare mob, if there are other mobs in the area, the chance of it spawning will be even less. I'm not sure the. 4), slimes can only spawn in every 10th chunk in average ("Slime Chunks"). Slime spawners were working fine before but lately a player on my server has been afking at his Slime farm (with slime spawners) and noticed they aren't spawning. 25. 40 chunks should be more then enough, are you sure they have enough room to spawn. as far as i know I’m doing everything right, ive lit up surrounding caves and my afk spot is at. 4 yr. Slimes are LOW on the spawn priority list. This method requires an underground room to be dug out before the farm is constructed. My conclusion is that you can have slimes spawn from below y40 all the way down to bedrock, but I need confirmation because I'm making a perimeter for a 4 chunk slime farm. 17. Do /kill @e [type=minecraft:slime] to kill all slimes. As the title suggests, I was attempting to build a slime farm on a multiplayer survival server (Vanilla, Spigot 1. Slimes spawn in super flat worlds because because of slime chunks. It is made to look like a vanilla line in the f3 hud. 5. My first time playing sky factory, and trying to make this smelter, but controller won't work. You also could switch to peaceful for a sec to empty the mobcap and then switch to another difficulty again and you should see some slimes spawning. Use Sea Pickles. As sb9884 pointed out, expand your farm upwards if you want more slime balls (and with the 1. You need an absolute minimum of 6 layers. Slimes can spawn regardless of light levels, other mobs can not, this will ensure that the only mob spawning is a slime. Yes, it's slime chunk (checked for 5 times) Stood more then 24 blocks away, but less than 128. The reason is that the game checks for enough space for the big slime to spawn when it decides to spawn a slime so the spawn attempt will fail in these tunnels (i. The world of Minecraft consists of several 16×16 blocks, the so-called chunks. SlimeSuppressor is a simple plugin that suppresses/disables slime spawning in slime chunks, potentially useful for superflat worlds. Through the center of the chamber, make 10x10 platforms while making sure to leave a few air blocks to separate them. Improve this answer. They are rare so they are spawned at the lowest priority only after all other hostile mobs have been checked - and even then 90% of slime spawns fail. Slimes spawn in specific “slime chunks” in the Overworld below layer 40. There are several reasons why Slimes may not be spawning in Slime Chunks, such as: Incorrect Chunk: Slimes will spawn only in certain chunks. Visualize Chunk Borders: To determine chunk borders, use the F3+G keyboard shortcut in Java Edition. Also, double check your seed and version on chunkbase. I have been waiting for about an hour afk with the game active at. 19 world. Yes :) No slimes are spawning in my slime chunk! First of all, even in slime chunks, slimes spawn far less frequently than most other hostiles, maybe comparable to. Make sure your mob cap is not being filled by other hostile mobs. Slimes spawn in specific chunks below layer 40. • 19 min. I tried to build a slime farm like I did in my 1. ArticlePlastic9272. It's not a slime spawner, it's a slime chunk (technically two right next to each other). Not in a superflat test world in slime chunks, not from slime water from tinkers construct, and not from the slimy tool modifier from tinkers (in fact, that modifier spawns a slime for half a second, before it vanishes). Max Mob Limit in the Surrounding Area. The second way to find slimes is to head to a swamp biome. If you do not want to light up caves, you will need more slime chunks with more layers for it to be effective. 6, and slimes WERE spawning in the daytime. As long as ur sure its a slime chunk they will spawn from y40 down to y 0. Slimes are Hostile Mobs added in Update 0. I have waited for around 15 minutes exactly 32 block from the closest edge of the chunk with no spawns. 13. From what I saw, the only way to stop the slime invasion is to half-slab or redstone-repeater every open block, with the former of the two being the obviously-cheaper answer. Additionally, the three sizes of slimes require. Took about 5 days to get the project finished all the way to level Y-5 bedrock. In Minecraft, a “chunk” is a 16x16 segment of the game world. After tunneling through long enough, you should be able to find a chunk that. 18. 8 slime spawning bug, this is almost a must). Slime size is affected by regional difficulty: chances range from 33% for each size at low. 17) and type in your seed. Slimes also spawn in slime chunks. Try moving a lil bit farther away, like 60-70 blocks. Once you find a slime, note the location, you know they can spawn in that chunk. 1. [Verify] Big slimes require a 3×2½×3 space to spawn, small slimes require a 3×2×3 space, and tiny slimes require a 1×2×1 space (or 1×1×1 if the upper block is not opaque). Simply type the following code in the chat: /give @s repeating_command_block. Check Details Hello :): pink. There is a big chance something is filling the mob cap. On top of what was said above, the game has a few criteria aside from slime chunk when checking to spawn a slime. Through my experience slime spawns in slime chunks need alot of work to make them viable. So it's a full 16x32 block space that spawns them, and torches have no effect. This method requires an underground room to be dug out before the farm is constructed. Tiny slimes will spawn once you're more than 23 blocks away if it's a slime chunk. Slimes basically only spawn in swamps due to low y level, and only in slime chunks. If the fraction of the bright part of the moon is bigger than that number, the slime will spawn. What about doing /locate and finding a swamp. It does. One out of every ten of these chunks is labelled as a Slime chunk, spawning Slimes naturally. So I have cleared an area worth two chunks from surface down to bedrock with multiple platforms for them to spawn in that chunk. Seed: 9035824829380937130. You have NOt spawnproofed 128 blocks in all directions. 5 blocks high; just use top slabs every. Just make sure you are below Y40 and the light levels are as low as possible. It does not prevent spawners from working though, either normal Minecraft spawners or mod added like Cursed Earth. ago. No torches or anything else is placed on the ground, and it is too bright for other monsters to spawn. • be the only person on the server when using it. Tho is sometimes difficult with terralith generation as it can raise the y level of swamps significantly. Also, slime don't spawn if you're near that chunk. No, slimes follow spawning mechanics of regular mobs, except they can spawn with a higher light level in slime chunks. Yeah, it doesn't spawn slime on aternos servers for some reason. What's more salient, though, is if non-slimes are spawning and you're not killing them off that reduces slime spawns even. Slimes are not light sensitive like other hostile creatures, therefore if a player locates a Slime spawning chunk, they can simply mark it with torches. Remember that caves can easily fill up a mob cap and prevent the slimes from spawning. Please note that my world used to be in 1. You can enter your seed into the tool, and it will locate the chunks on your world that are slime chunks. I even downloaded a slime chunk finding mod, and. I have noticed that slimes are spawning in all 3 chunks, even though slimefinder says it's an empty chunk. Yes, down to Y0, no light, slime chunk on chunkbase. 0. Slimes not spawning My slime farm is in a slime chunk (I think because my server updated to 1. Slime Chunks are predetermined by your savegame seed, and are always the same for a specific seed, just like the generated terrain. Def check y level and ur distance from their spawning area first if u r def in a slime chunk. So, according to the information you have given, you are doing everything correctly, and Notch is simply not smiling down upon you. Regular mobs won't spawn on glass, or stained glass, so slimes will not either. Let's get squishy!This tutorial will show you how to locate a slime chunk without external tools and set up. January 27, 2023 04:20. Not sure of the bedrock spawning spheres sizes. To clear an area for your slime farm, you will want to remove every block in the chunk below Y=40. This mod expands your F3 screen to show the world seed (pre 1. Java version 1. A chunk in Minecraft is a 16 x 16 area of blocks on the horizontal axis. The technical answer is to dig out a complete slime chunk not higher than Y 39. Seems the slimes have a hard time spawning in my multiple worlds as well. Slimes can spawn in non lit areas, but other mobs are much more common, and slimes are very large, so if there is any other mob there they will still attempt spawning but will fail because there are other mobs in their space. Otherwise, there is a 3. We've dug out a 2x2 chunk area, verified that they are slime chunks in singleplayer, and lit a border of caves for 128 blocks from our afk spot, and not a single slime spawns. Here are some reasons why they won’t spawn: Max Mob Limit in the Surrounding Area. Y: 40 is considered the highest elevation at which slimes can spawn in any. If you simply move to a higher altitude you can avoid slime spawns around you that way. Yes, its a multiplayer world. The world of Minecraft is split into chunks, each being a 16x16 square that extends vertically throughout the entire map. plains biome and theres only the one plattform visible in the screen. In a regular superflat world, there are 4 layers, last is bedrock, and the rest is grass and dirt. "Slime chunks". I still have a lot of lighting up to do, and need to look at the spawn parameters again, but, it’s just not working either. 1 Answer. I even tried to clear out an entire chunk, to no avail. Slimes spawn in the Overworld in specific "slime chunks" below layer 40 regardless of light levels. You have NOt spawnproofed 128 blocks in all directions. TL;DR; Use 2 repeating command blocks which contains the following: /kill @e [type=minecraft:slime] /kill @e [type=minecraft:item,name=Slimeball] Apart from @ExpertCoder14 's answer, you can also use another repeating command block with /kill @e [type=minecraft:slime]. Light the area so no other hostile mobs will be able to spawn. A slime will split into two smaller slimes when killed unless the slime is already the smallest size. Note: they seem to spawn just fine in swamp biomes though. They spawn deep underground in chunks and also during the night in swamp biomes. I assume it might be the mob cap but i'm not sure how to check how many mobs are within a 128. However, like lotus49 said, a slime farm does not need to be perfect to be more than adequate. They are pretty easy to kill too, and if a large Slime (larger than 1) is killed, it spawns between two and. For best results, use jack o'lanterns set in the floors, because slimes can spawn on those blocks. Slimes not spawning in 1. But after 2 hours of waiting no Slime spawned. You need to be at least 24 blocks away but not more than 128 for them to spawn. -2. They will still spawn at light levels above light level 7, when other mobs do not. Bug Description Slimes do not spawn in slime chunks. A trick that you can do is to click the key combination f3+Q followed by f3+G. Make sure you're not further than 128 blocks away from the killing platform, because after 128 blocks mobs despawn immediately. No mobs spawn, slimes don't even spawn at all on slime chunks. Most Slime farms have a minimum of 4 and usually a LOT more than that. Make sure the farm is the correct size. 4 with my friends and we wanted to build a slime farm. The most efficient way to find a slime chunk is to go underground below Y-40 and create tunnels big enough to spawn small and medium slimes. On one of my worlds, I found a slime spawn down in a cave. SlimeSuppressor is a simple plugin that suppresses/disables slime spawning in slime chunks, potentially useful for superflat worlds. The problem is, whenever i make a mob farm. because farms based around slimechunks are bad, if you don't build one in a Parimeter. How do you increase slime spawn rate? #2 - Increase the spawn rate. (You can check which chunks are slime chunks online). First, slimes are a bit annoying to find. Slimes don't care about light at all in slime chunks, so you don't have to worry about having too much light; just make sure no block is light level 0. Assuming your area is in the correct zone (inside a Slime. Jul 29, 2019 2 0 0. - Slime Chunk: 0-39. While chunk spawning always has a 10% success rate (not taking slime chunk chances or anything else into account), the success rate of swamp spawning depends on the light. 19 world. There is a bug where it runs the spawn cycle for slimes twice. No slimes for 30 minutes. Built in minecraft:desert biome. The space they spawn in must also be clear of solid obstructions and liquids. I ended up just digging out all 8 chunks. I expected for locational spawn requirements to be overridden by the spawners when checking spawning conditions. the-nord-jord • 9 mo. Slimes are bouncy cube-shaped hostile mobs that spawn in the swamp, and occasionally, deep underground. More info from the site. 19 and Minecraft 1. On average about 1 in every 10 chunks is a slime chunk, so a 4x4 chunk area should give you enough chunks to include at least one. Unfortunately the only way to determine if a slime chunk is a slime chunk is to get lucky and find where slimes spawn or use a 3rd party software like this. The whole world of Minecraft is divided into thousands of chunks. Every mob, including slimes, has the same chance. 4 that mobs wouldn't spawn if the render distance was less than 10 chunks. A 16 by 16 block area is represented as a chunk. This method requires an underground room to be dug out before the farm is constructed. Kinda cheaty but it'll get you the info quick. Apart from spawning in swamps (added in 1. Tho is sometimes difficult with terralith generation as it. • make an afk chamber at y134 at the golem's xz. The light level of your chosen area must be seven or less. For lighting use jack o' lanterns (much cheaper then sea lanterns, but you can use both), so that there isn't any spot in a platform that has light 7 or less because. TY! Why are slimes not spawning?Jul 2, 2019Slimes are shy - they won’t spawn if other mobs are nearby. 4 version (Spigot) I have setup for slime farm, but Slimes are not spawning. There is an option to show slime chunks in the minimap settings btw. I've dug out multiple different slime chunks (triple-checking with Chunkbase to make sure I had the correct coordinates), lit up surrounding caves, made sure the farms were made from spawnable blocks, but. Torches do not interfer with slime spawns (from one of the mythbusting videos a while back) and suppress other mob spawns. During construction of the pads, there were a couple of skeletons, zombies, and a creeper, but nothing. ) I know its a slime chunk as I've seen a medium slime spawning in the region, And I've cleared a 130x130 size area for them to. And keep in mind that Slimes completely ignore light levels; this is why they can spawn in. In Minecraft, not every chunk is a slime chunk. Thats a slime chunk and has nothing to do with swamps. All that means is that it blocks all natural hostile mob spawns regardless of light level, so you don't have to spam torches. Nov 15th 2022. 19. Make sure there are no caves with zombies or any other mobs in the vicinity. Slimes are bouncy, cube-shaped hostile mobs that spawn deep underground in particular chunks, or in swamp biomes. I had to dig down pretty deep (-14) in my chunk and start building multiple platforms up before I saw any significant slime spawning. Three main tricks are commonly used to handle them, although the first two are outdated methods. There is a 3 chunk x 1 chunk that spawns slimes. Chunkbase. Slimes spawn in super flat worlds because because of slime chunks. Shown is a group of monster spawners in a flat world. It allows slimes to spawn at Y = 70 and Y = 71. Lit up the area to avoid other mobs spawning. Only sizes 1, 2, and 4 spawn naturally. Even when you spawnproof a lot, a single chunk can still be very slow, also; slimes can also despawn. Slime spawning and despawning uses different light and distance parameters from other 'hostile' mobs. Slimes will only spawn in light in a slime chunk. Yes, moon phases affect slime spawning in swamps. 2. They attack by jumping at their targets, come in three sizes and larger slimes can split. Slimes spawn in the Overworld in specific chunks below layer 40 regardless of light levels. Description. Slimes only spawn in certain slime chunks or swamp/mangrove swamp biomes. Mobs can spawn within 128 blocks from a player, so although you've lit up nearby caves it would be nowhere near enough. 5. There are 3 separate 1 chunk x 1 chunks scattered around the area. In chunks they spawn below Y40(other biomes slime chunks) Y60 (in swamp slime chunks) when not in swamp biomes, but only in designated slime chunks, your. Slimes spawn in random underground chunks below Y=39 at any light level, and can also spawn in Swamp Biomes at night depending on the phase of the Moon. Also lit up surrounding caves and ravines, although there might still be some areas that I have not lit up. 4), slimes can only spawn in every 10th chunk in average ("Slime Chunks"). The problem might be mob cap but it's 1. Join. The slime chunk algorithm in Bedrock Edition is different from in Java Edition. Also light up any non-flooded caves in the vicinity, as it will significantly increase spawn rates of slimes - both reducing wait time to identify a slime chunk you dug out and significantly increasing drop rates of your farm once you build it. It allows slimes to spawn in all light levels. Did u even read what he said. 18 (only 400 blocks around spawn is loaded in 1. ExtraBiomes has others swamps that just don't spawn any slimes, sadly. Mobs will not spawn closer than 24 blocks away from the player. This is your vertical position in the world. Slimes spawning in slime chunks spawn regardless of light level so that isn't an issue. Assuming your area is in the correct zone (inside a Slime spawn chunk and within ~40 blocks from bedrock), you also need to check the ravine nearby and light it with torches to keep other mobs from spawning nearby and stopping the Slimes from spawning. 17 to 1. Can slimes spawn in chunks surrounding slimechunks. I'm making an adventure map, and a recurring (and very irritating) problem is that Slimes spawn all over the place. ago. Tutorial explaining how the slimes spawn in swamp biomes in minecraft. Try having many spawn layers from levels 0-40. They do not spawn outside of spawn chunks. With this command in a Command Block, an automatic elimination of Slimes is possible: Just set it to Repeat and Always Active, and then you're done. minecraft-java-edition; Share. RELATED. The problem is, whenever i make a mob farm. When the game attempts to spawn a hostile mob it has a chance of selecting to spawn a slime. Aaryan2712 • 2 yr. But the strange thing is, they're not spawning at all. Ideally > 7. I think you could make a dough and lime dye slime farm faster than both, but it’d be. Mobs only spawn until mob cap is reached (70 on single player). The slime chunks are accurate, but spawn rates seem to somehow be uber low. I once experimented this hard way. Slimes will spawn at any time of day in a swamp and any point in the moon cycle so long as the light level is below 7 and you are below y 69 and above y59. However, just as with other mobs, slimes require an opaque block to spawn on top of. Every chunk that is generated in a world has a 10% chance of being a slime chunk. This creates a WorldGuard region with that WorldEdit box. The world of Minecraft is split into chunks, each being a 16x16 square that extends vertically throughout the entire map. I've dug out multiple different slime chunks (triple-checking with Chunkbase to make sure I had the correct coordinates), lit up surrounding caves, made sure the farms were made from spawnable blocks, but. Doing this will leave some room for slimes to spawn on. Mumbo Jumbo from hermitcraft tried this Swamp one and DocM77 keeps checking it regularly and it hadn't generated any slime but most people I see use chunks. In Superflat type worlds, the spawn rate is decreased. The first step to making a slime farm is to find a slime chunk. 1. maximaal04 • 54 min. Big slimes require a 3×2½×3 space to spawn, small slimes require a 3×2×3 space, and tiny slimes require a 1×2×1 space (or 1×1×1 if the upper block is not opaque). Also they spawn in specific y levels depending if it is a slime chunk or swamp. I've had plenty. Only sizes 1, 2, and 4 (NBT Size tag values 0, 1 and 3 respectively) spawn naturally. Find a slime chunk. This will show chunk boundaries. They will spawn only in darkness if they are on the surface of a swamp. Spawning Slimes spawn in the Overworld in specific "slime chunks" below layer 40 regardless of light levels. Description. I’ve used slime in a bucket. If these conditions are met and the altitude is acceptable, there is a 50% chance of spawning a slime. “Apart from spawning in swamps (added in 1. You also need to be a decent distance from the area for slime to spawn and since you're underground you likely haven't lit up nearby caves (most mob spawns aren't slimes regardless of if they spawn in the slime. this also adds a clientside command, slimechunkf3-seed, which can be used to configure the seed from which the mod calculates if the current chunk is a slimechunk. Quite a few players don’t know about the spawning mechanic of. ago. New moon won’t get you much of anything. #15. Not possible because slimes only spawn in slime producing chunks. 19. I'm not sure if glowstone prevents mobs from spawning. So I have mined out a slime chunk I found on chunkbase, it's the whole chunk mined out, 4 high, lit up and everything. Slime chunks can be in every biom (except from mushroom island) but they're below y=40 so you have your farm pretty low, i guess. I think it's on the last page of config options. 18. I started at y-59 and noticed they weren't there so I went back up to y0 and tried all levels to y7 without results. Also, slime don't spawn if you're near that chunk. A single cage was placed in a slime chunk, and is the only one of the. You’ll want to have plenty of. The area I have dug out is at level 33 which is less than 40 so slimes should be spawning. The light level requirement for slime spawning in swamps is different from that of most hostile mobs, which spawn only at light level 0. you need to be further out. Oct 28, 2020. For one, pandas are a rare mob that only spawn in bamboo jungles in Minecraft, and for two, breeding pandas is a lot of effort compared to just finding a slime chunk that spawns slimes. Aug 21, 2015. You can create an artificially dark area by covering a section of the. . (I'm not sure of the validity of that statement, but it's best to be safe, but top slabs do work)can't get slimes to spawn at all in slime chunk [Java] so I’ve built this massive slime farm in a slime chunk with a bunch of levels all the way from y-6 to y-40. Slime spawn in slimes chunks below y40. I started on y=11 and waited around by the chunk for anything to spawn, but nothing has, but I. For highest efficiency, you want your spawning platforms to be 2. Slimes spawn in certain chunks (16x16 areas) of the map, which you can use to set up a slime farm. The algorithm doesn't depend on the world seed, thus the chunks that slimes can naturally spawn in inhabit the same. Slime chunks are specific chunks of a Minecraft world, where slimes can spawn underground. Our other method of traval; Stargates, has the gate room itself at Y=30. Simply select your current version (such as Java 1. 1 - Slimes will spawn in a slime chunk in an ocean biome. Chunks are 16x16 blocks wide (x and z axis) and 256 blocks high (y axis). Slimes spawn in the Overworld in specific "slime chunks" below. In Minecraft, not every chunk is a slime chunk. Here are some reasons why they won’t spawn: Max Mob Limit in the Surrounding Area. Need a slime farm, so i found 4 slime chunks across eachother. This will display the gridlines separating each chunk, making it easier to identify potential slime. Cypher_Xero. . Aug 21, 2015. Slimes can spawn in any light level, so having your area well-lit will not stop them. ago. With the way slime spawning works slimes should not spawn in non-slime chunks, period, unless it is in a swamp biome between y=50-70; the actual coordinates of the individual spawn attempt are used to determine whether or not they can spawn in a chunk below y=40:The best and most efficient way to find slime chunks and actually see slimes spawning is to mine down to Y: 40 and below. Mobs spawn everywhere inside a sphere of radius 128 around you, except for a sphere of radius 24 around you. 8 release. You'll most likely see slimes spawn. The light level of your chosen area must be seven or less. Slimes spawn in areas below layer 40, and also spawn on the surface of swamps during the night, depending on the phase of the moon. Doesn't have to be a swamp. So a couple of reasons, first you have an indredibly small platform, only about 9 spawnable spaces (for the big and medium slimes). As a remedy i have used a spawner with a slime egg, taking advantage of extended possibilities, but slims WONT spawn. World Download:. Only a certain number of them can spawn in a slime chunk so nametag them to prevent despawning and hide them somewhere in the chunk to prevent new slimes from spawning in.