Minecraft Data Packs / World Generation

Harlondunei and other elvish worlds

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Eledwhen's Avatar Eledwhen
Level 31 : Artisan Artist

Harlonduneï and other elvish worlds is a worldgeneration datapack modifying the generation of the overworld and adding 4 customs dimensions, each of them consisting of a planet bearing complex life.

The main goal of this datapack is esthetics, not functionality. It's done just to be beautiful, and try to create some new environment with extra terrestrial life.
There are strongolds but not villagers and pillagers.

This datapack is mainly intended for a creative experience. You can survive in it in survival but the game experience will be far from being optimal.

To travel between world, you must find a spaceport in Harlonduneï, and then you must come into a shuttle and activate it. It will tp you at your current coordinates in the other dimensions (and not in 0 0 0!) and will generate a ship (you will spawn inside).
This ship will allow you to travel between dimensions via the same way. (spaceports in orther worlds do the same)

Warning: when teleporting back to Harlonduneï, no ship will be generated. I advise you to come back to the homeworld using the ship you left it with. And DO NOT put something near or on the ship, because otherwise, you could end up with a new one stacked on the first...

All the worlds have the vertical structure of the upcoming 1.18 version (including caves, but not biomes), and a build limit height of 512 blocks.
In the file mirror link, you can still find the 1.16.2 version.



It's the overworld, the homeworld. The planet is massively covered with forests and since its colder than Earth, also have rather large ice cap. A small desert and semi arid zones can also be found.

Main terrestrial ecological zone:
Hallifirian, pastel yellow grass, orange/dark red coniferous, small blue vegetation.
Anduneledh: pink forest, cold.
Celenuin: turquoise forest, temperate.
Hadhondor: Yellow forest, temperate.
Varuine: land climaticaly at the border of polar cap, northern limit of life.
Haradren, loteliste: semi-arid and desert zone, warm.
Idil forest, and Rathenil forest.
Olonath forest.
Ravenien with diamond and gold ore at the surface.
Melfuelin and Orgillion: marshs.
Orthelien, a beatiful open land.
Sirion and Fanniriath, a green and yellow plains.

The planet also bears some complex underwater ecosystems, including the deep reef, the abyssal fungus forest, the kelp forest... (inspired of subnautica)


A planet orbiting a white giant star, with light purple sky and grey vegetation. The planet is really cold in winter but experience some temperate summer allowing the development of diversified vegetation. You will find forest, some open lands, polar cap and frozen lands experiencing winter and waiting the coming of spring.


A cold planet orbiting a white giant star. Light purple sky (a little blueish than caladan) and light turquoise vegetation. There you will find 'blob', it's a sort of vegetation. The planet has a massive polar cap and some deserts and arid zones in the intertropical
regions. There is also mangroves and humid zones.

The planet orbite a binary star, the second one being a red dwarf. To show what the landscape should look like when the second is in the sky and the first is down, each biome has a red variant.
The ground default block is diorite.


A planet orbiting a orange dwarf star, with yellow/orange sky and blue vegetation.
No polar cap there, the planet being rather warm.
The ground default block is granite.


A planet orbiting a yellowish dwarf star, light green/yellow sky and darker vegetation of the same tone. The planet is split between a normal zone and the celenegil sea, a vast land where the concentration of a toxic oxyde prevent life for prospering. Magenta, pink and purple strong colors due to this substance.


Spatioport: allows the travel between worlds. I would like to add more variations to those already existing.

Oceanographic institutes: some useful stuffs for exploring the ocean than you wild not find in ocean monument since they don't spawn.

Some houses: in harlonduneï, the building depending of the biome, just for decoration, some stuff and food in the interior.

CCCT: Caladan, Cross Continental Communication Tower, just for being beautiful.

Berry fields: a small field of berry in Olonath forest.

Cacao field: a small field of cacao in Aldewynt.

Big champi: Chaney, it's a life form.


All type of stones are usables in craft using cobblestone or stone. I've done this for a upcoming rewamp of the underground but i've decided to cancel it until knowing more about 1.17 stuff.

Spotwitch: the zerra, for the base of my work, some features i've modified and for understanding how things work.
BrackenStrike: the-bracken-pack-v9-1-16-2-full-release-e2260, for some features i've modified.
JdoesStuff: Wildworld, for some features i've modified.
Mc_da: For the awesome trees he's done.
Biome o plenty: for inspiration, long ago.
Subnautica: for inspiration
CompatibilityMinecraft 1.17

10 Update Logs

Update #10 : by Eledwhen 08/07/2021 5:49:31 amAug 7th, 2021

Tweaked the shores of Olonath on Harlonduneï
Tweaked the trees of the Grim forest on Caladan. Added patches of black concrete powder in the ground of the same biome.
Added patch of moss block in the ground of Orthelien, Harlonduneï, and added azalea and flowering azalea. Reduced a little the spawn rate of the little trees.
Added big kelps in the kelp forest of Harlonduneï.
Changed the trees of the long, short and mixed forests of Chaney.
Rewamped a little the barren spike on Celenegil.
Remowed the sand of the red mangrove on Aldewynt.
Changed the clay into red sand for the red sea and red dry forest of Aldewynt.
Added new biome on Caladan: thermal plain.
Added a new world: Dewyntha, with only two biomes for now. It's more an indication of the colour palet I want to use for it.
Added a new world: Amanyth, with only on biome for now. This is a huge forest that can be problematic for PC with low performances... And water is acidic in this world. Have fun.
Added a new structure: research station, in the purple part of celenegil.

Reworked the travel system between the different world:
Spaceport have been removed. Now, you can only find ships.
When you find your first ship on Harlonduneï (the overworld), go inside, it will allow you to reach a space station in a space dimension that a function created during your travel. This station is incomplete and you are in fact in the hub, which only allow you to return to Harlonduneï. But you will find several places in the hub when you can fill white shulker with specific material, allowing you to build other parts of the
station. One of this parts, the long range travel section, will then allow you to reach the other worlds.
Note that only one station cans be constructed (except if you want to start building manually another one in the void nearby, but you wouldn't have any teleporters in it).
When you leave a planet for the station, your departure coordinates will be stored, which means that when you go back to this world, you will land where you left it.

Warning: when you step on the gold pressure plate with the ressources needed to build a section of the station in the white shulker box, lag may occur. On my side, I need to step on the pressure plate several times.

Also: I don't advise you to use the datapack in 1.17.1, as fossils behave weirdly, this breaking several biomes.

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12/03/2022 4:39 am
Level 65 : High Grandmaster Engineer
Brackenstrike's Avatar
Came back to this data pack to recover after watching rings of power. Felt motivated to say thank you for being a genuinely creative person and putting your heart into what you made! It shows!
12/11/2022 10:51 am
Level 31 : Artisan Artist
Eledwhen's Avatar
Hello. Thank you for your comment, it is really heart warming, especially because this universe largely exceed the scope of this datapack alone.

The problem is that it tends to lead toward pretty big minecraft projects that I have now not that much have the time to handle.

Currently, I have a 1.18.2 version of the pack for the overworld (Harlonduneï, biome only) alone, and I don't know what to do with it.
12/12/2022 6:37 pm
Level 65 : High Grandmaster Engineer
Brackenstrike's Avatar
Sometimes I feel bad for how much gets lost in translation between my ideas and and their final result. But hey, regardless of how much is actually put into gameplay, the vastly more important thing is that this universe already lives and breathes in your mind.

"A single dream is more powerful than a thousand realities."
—J.R.R. Tolkien
11/18/2021 4:48 am
Level 1 : New Explorer
PaniZima's Avatar
Amazing pack. I wanted something fantasy-like for a looong time so this makes me really happy. Tho I have to say, biomes are massive with pretty much nothing in them. I know you wanted to add cities so I'll just wait for those, as well as some other structures (hopefully). Also can't wait until it's survival friendly.
Keep up the good work! :)

P.S: loading other dimensions takes so long that I always end up in void
11/18/2021 2:10 pm
Level 31 : Artisan Artist
Eledwhen's Avatar
Thank you!

For what you said, the best I can do is to make a small update to make the pack more suited for a survival experience: smaller biomes, introducing the vanilla structures, and tweaking the mob repartition. The datapack would stay in 1.17.

Mojang is improving worldgen and changes it too deeply too often for me to keep up, which means that all ideas I had for this pack will have to wait a amount of time I cannot predict.

For your problem about loading other dimensions, it's a bit weird because my pc cans barely run minecraft at 20 FPS without optifine and I still manage to TP to the outer worlds. I fall into the void but eventually end up on the surface without taking damage. How is your PC? Be careful, I've forgot to specify that going on Amanyth without a good PC config is strongly non advised. Other ones are fine for me.
11/18/2021 2:42 pm
Level 1 : New Explorer
PaniZima's Avatar
I'm more than happy to wait for all your planned ideas :)
my PC isn't the best, but it can run Minecraft at solid 60 fps so I think it should be able to load other dimensions, so I'm not sure where the problem could be
10/14/2021 9:18 pm
Level 1 : New Explorer
Revon's Avatar
i absolutely love this pack, it looks gorgeous. however, it is a little hard to find and explore all of the biomes becuse they are all soooo huge, i can't even use the /locatebiome command half the time, it always says the biome is too far away. also making the /locate command compatible with spaceports for easier access would be nice.
10/15/2021 5:54 pm
Level 31 : Artisan Artist
Eledwhen's Avatar
Well, I can feel you for the size of the biomes but it was decided with the will to make entire cities in the same biome in my mind. This is also why I think this datapack is designed for creative mode.

If you want, you can change the size of the biomes and make them smaller by going in the file data/minecraft/dimension/aldewynt (for changing the size of the biomes on Aldewynt)
Then you just have to increase the "first0ctave" by two. Luckily for you, it's at the beginning of the files, and there is four of them. You can open the file with notepad if you want.
After this you can generate a world as you did before and enjoy.

For now, I've canceled any further development until the worldgen stops to be experimental and become definitive, but when this will happen, I think I will make a survival friendly and a creative friendly version.
Also, the number and looking of biomes are not final, especially on Aldewynt, Chaney, Caladan and every other world that is not the overworld (Harlonduneï). I hope to improve things when the time comes.

For the /locate command, it sadly doesn't work for custom structures. I myself struggled a lot at the beginning to make sure they were spawning, so if something is to be done, it's on Mojang's end.
09/20/2021 11:19 pm
Level 1 : New Explorer
Revon's Avatar
great pack but PLEASE change the text color to something other than light grey i CANNOT read it
09/22/2021 4:57 pm
Level 31 : Artisan Artist
Eledwhen's Avatar

I've done it. But if you are using the light background I could suggest you to switch to dark mode as most people use it I think. (you can change it at the right of the private message icon)
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