- 03 May (Mod) added 1.5.2 download
- 21 March (Mod) added 1.5.1 download
- 14 March (Mod, App) added 1.5 download; added link to new Slime Finder
- 22 December (Mod) added 1.4.6 download
- 15 November (Mod) added 1.4.4 download
Online Map Generator
Old Slime Finder: http://mcslimes.appspot.com/
Version Compatibility: The logic of the app has not been modified since the app's release, because the slime chunks have remained the same since then. For this reason, I will now only add a note if the app stops working.
Video Tutorial (old Slime Finder App):
SSP: Get it from your level.dat save file, use the "/seed" command ingame or use the slime mod below to display it in the F3 menu.
SMP: Use the "/seed" command if you can. Otherwise you need to ask your server admin for the seed itself or the level.dat of the map.
Note: Works only in SinglePlayer as of 1.2
This mod expands your F3 screen to show the world seed (pre 1.8) as well as whether or not slimes can spawn in your current chunk. You need to manually copy the .class file into your minecraft.jar (open with WinRAR or the like) and make sure to delete the META-INF folder if it's still in there.
If this doesn't help there are lots of tutorials out there, e.g. here.
New in 1.5.1:
- shows effect of lunar phase in swamps (see http://www.minecraft...slime-spawning/ )
Just gimme link:
Finding the exact borders:
- with mod : look straight (!) down and watch the f3 text that says "Slimes: Yes" (or No). you need to place your cursor/camera so that it doesn't move if you rotate (it's easier than it sounds, just clarifying..). then move around and you can see the Slimes text changing as your cursor moves between the block
- without mod: do the same looking down thing and watch your X and Z coordinates while you move around. it will be at a whole number when crossing blocks. if that whole number is a multiple of 16, you're looking at a chunk border. do this for both x and z and you found a corner.
the multiples of 16 are displayed in the image of the online tool (the screenshot with 2 coordinates being displayed is outdated). make your area smaller if they don't show up.
Still no Slimes? (might be outdated)
- without mod: double checked x,z coordinates?
- while standing on the spawning ground, your y coordinate must be 40.6 or less.
- room at least 3 high?
- one block above your ground, don't place anything except a few torches for lighting the room (you dont need it for slimes, just to prevent other mobs from spawning)
- don't play on peaceful!
- don't be closer than 24m to your room and don't go more than 128m away from it
- wait long enough (if your room is fully enclosed, you dont need to be around, just come back every once in a while, they won't despawn unless you walk far enough away (>128m)). obviously, don't pause the game
If you still don't get spawns after several hours (for a 16x16 room I'd say), check if other hostiles are spawning if you kill the light. It should take a slime approx. 10 times longer to spawn than any other type of hostile mobs.
If no hostiles are spawning, your world's hostile spawning might be jammed by slimes. If you're alone / on SSP, walk 250m in any direction and go back. Hostiles should spawn again.
If none of this helps, report here.
In case anyone is interested in the actual formula (in java):
Random rnd = new Random(seed + (long) (xPosition * xPosition * 0x4c1906) + (long) (xPosition * 0x5ac0db) + (long) (zPosition * zPosition) * 0x4307a7L + (long) (zPosition * 0x5f24f) ^ 0x3ad8025f); return rnd.nextInt(10) == 0xPosition and zPosition are chunk coordinates.
To sum it up, it generates a random number (0-9) that's always the same for the same chunk and world seed. if that number equals zero (10%), the chunk will spawn slimes. The constant numbers were picked randomly I guess.
You could also eliminate the Random stuff by looking up Java's Random algorithm.
Fully Automatic Farm Guide:
(Non-automated) Farm Guide:
Thanks for all the feedback