CurseForge · Minecraft mod
Slowlight
Kilns that take real in-game days to finish, and Waystones that post your stuff to each other over days. Leave things to age while you're off playing, then come back to cider, cheese, mossy stone and music discs.
Quick answer
Which Slowlight release matches 1.20.1 Forge?
slowlight-0.9.1+1.20.1-forge.jar targets 1.20.1, 1.20 with Forge. The project page does not say whether this file belongs on the client, dedicated server, or both. No extra mods listed for this file.
Where it goes
Is Slowlight required on the client, server, or both?
The project page does not say whether this file belongs on the client, dedicated server, or both.
The source does not explicitly classify this release as client-only or server-only.
What else does slowlight-0.9.1+1.20.1-forge.jar need?
slowlight-0.9.1+1.20.1-forge.jar on 1.20.1 Forge. Every mod below is checked against that same setup.
This file does not list any required mods. Do not add a library just because a different file uses it.
4 extra mods were pulled in by other dependencies. Indented rows show who needs each one. We only count dependency files that match this setup. A file for another loader does not fill the gap.
Before you install it
Add Slowlight without breaking your instance.
Built for slowlight-0.9.1+1.20.1-forge.jar on 1.20.1 Forge. Pick another file and the loader, install side or required mods may change.
- 01
Stick to this file
Use slowlight-0.9.1+1.20.1-forge.jar. It targets 1.20.1, 1.20 with Forge; another release may have different loader, side or dependency requirements.
- 02
Bring the mods it needs
This file does not list any required mods. Do not add a library just because a different file uses it.
- 03
Put it on the correct side
The project page does not say whether this file belongs on the client, dedicated server, or both.
- 04
Pick the file you checked
Use the “Get this file” button beside slowlight-0.9.1+1.20.1-forge.jar. It opens that exact file at the source.
About this project
What does Slowlight add?

Slowlight adds kilns that take days to finish instead of seconds.
There's no fuel and no menu. You drop something in, close the lid and go do something else. Come back a day or a week later and it's done. The timer runs on the world clock, so sleeping doesn't skip it and leaving the area doesn't pause it. The kiln just catches up the next time it ticks.
The fun part is coming home to it. Set up a row of kilns, go off mining for a few days, and when you get back there's cider and mossy bricks waiting for you.
New in 0.9.0: Waystones. Pair two, drop a stack in one, and it arrives at the other one to three days later, sometimes changed on the way: glass sent to the End comes out as Starglass. Some recipes now wait for a full moon or a dark cellar, and milk left a week in the dark becomes cheese.
The rest of the mod is built around the same idea: a lantern that's brighter at night, an hourglass that counts days, flowers you press over three days, wood that goes grey in the weather, three music discs, and a Potter villager with old ruined yards to find.
Kilns

The Patient Kiln holds one item. Put it in, close it, wait. Hoppers and Create funnels can feed it from the sides and pull the result out the bottom, and a comparator shows how far along it is.
The Long Kiln takes a whole stack and bricks itself shut. It takes three times as long, but does the whole stack at once. It seals when it's full, or 10 seconds after you stop adding things.
The Ember Kiln is the Nether one. It only works somewhere hot, and there it's twice as fast. Anywhere cooler it just holds your stuff and waits.


What comes out

Drinks: Amber Draught from honey, cider, Dusk Cider, Duskbloom Tea (a minute of night vision) and Lanternwine.
Food: preserved berries, Duskbloom Jam, cured cod and salmon that keep you fed longer, Lanternfruit preserve and candied peel.
Then there's the stuff time does on its own. String turns into cobweb. Coarse dirt turns into podzol. Cobblestone and stone bricks go mossy, except in the Nether, where cobble turns into blackstone. Honey blocks crystallise into sugar. Cornflowers ferment into a darker blue dye. Copper oxidises one stage at a time. Rotten flesh eventually becomes leather.
Some recipes need the right weather. Dirt only turns into mud in the rain, and sponges only soak up water in the rain. Kelp and wet sponges only dry on clear days. Ink only gets its glow under the night sky. If the weather's wrong the timer pauses, and the kiln tells you what it's waiting for.
You can hatch the sniffer's old seeds too: torchflower seeds take 2 days and pitcher pods take 3. Leave gravel or sand in for a week and it comes out suspicious. Place it and brush it for flint, bones and nuggets, and sometimes an emerald, a shard or a pottery sherd.

Waystones

Waystones are a slow post. Pair two of them with a Twin Pearl, put a stack in one, and it turns up at the other a day later, or three days later if the other stone is in another dimension. Every trip burns a Chorus Pearl, which you make by leaving popped chorus fruit in a kiln out in the End for three days.
Some things change on the way. Glass sent from the Overworld to the End comes out as Starglass. Candles sent from the Nether to the End become Starwick Candles. Stained glass sent to the Nether arrives as crimson, warped, soul or magma glass. Stone bricks sent home from the End turn into Hollowstone. A feather that leaves the End becomes an Unfalling Feather: carry it and you drift down instead of falling. An apple sent from the End to the Overworld becomes a Wandering Apple, and eating one brings you straight up to the open sky. JEI lists every route.
Chorus Pearls also make the Pearl Lantern, Pearl Chain and Block of Chorus Pearl. The Display Pedestal holds one item on show.
Moons and cellars

Some recipes now care about more than the weather. Leave a glass bottle out under a full moon and it fills with experience. Rotten flesh turns into phantom membrane under a full moon too, and a bone block becomes a skeleton skull under a new moon. A water bucket freezes to ice on a cold night.
A bucket of milk left a week somewhere dark becomes a Cheese Wheel. Set it down and eat it a wedge at a time. Mead, cider and Lanternwine also age faster in a dark cellar.
The Moondial reads the moon. Under open sky a comparator gets 1 at full moon, 5 at new moon, and a different strength for every phase between. A Letter to Later is a signed book sealed with honeycomb for 1 to 365 days, and it won't open before then.
Moths gather round the Slowlight Lantern and ripe Lanternfruit at night.
Music discs

Three new discs, made by leaving a vanilla disc in the kiln: - Patient Light, from mellohi (4 days) - Lantern Hours, from stal (5 days) - A Week In, from far (7 days, obviously)
The lantern and the shards

The Slowlight Lantern is dim during the day and bright from dusk to dawn. Underground it just stays bright.
Slowlight Shards come from leaving an amethyst shard in a kiln for a week. Sniffers dig them up sometimes too. The lantern needs one.
Still Shards are an End thing. Leave an ender pearl in a kiln under open sky in the End for 10 days. While you're out there, obsidian turns into crying obsidian and chorus fruit pops.
On 26.2 and up, a sulfur cube that eats a Slowlight Shard block falls at a fifth of normal speed. One that eats a Still Shard block hangs in the air and stops dead when you hit it.
Both shards work as armour trim materials, and there's a Patience trim template with an hourglass on it.

Duskbloom and Gloamwood

Duskbloom is a crop the sniffer digs up. It only grows at night and glows a little when it's ripe. The petals make light blue dye, and they go into tea and jam. Leave them under the night sky for two weeks and they harden into a Slowlight Shard.
Gloamwood is a blue-grey tree with the full wood set, boats and hanging signs included. Lanternfruit hangs under its leaves and glows when it's ripe. Wrap its peel round a torch for a Lanternfruit Lamp.
Keeping time

The Sandglass is an hourglass that counts days. Click it to set anywhere from 1 to 7. When the sand runs out it sends one redstone pulse and flips itself over. A comparator reads how much sand is left. It doesn't work in the Nether or the End.
The Sundial gives a comparator signal from the time of day: nothing at night, full strength at noon. It needs open sky.
The Keepsake Urn is a 9-slot time capsule. Pick 1 to 30 days and seal it with a honeycomb. It won't open until then, not for you and not for hoppers. Break it early and it cracks and spills everything.
Slow crafts

Gloamwood left out in the open slowly fades to silver in patchy steps, a bit like copper. Wax it with honeycomb to keep it, or scrape it back with an axe.
The Flower Press turns any flower, modded ones too, into a Pressed Flower over three days. You can lay them on the ground, up to four per block like Pink Petals, or put them on walls. Each one uses its own flower's colours, in one of 47 petal shapes. Glowing flowers still glow once pressed.
The Slow Candle burns for four days.


Building blocks

Slowlight Shard and Still Shard blocks come in 11 designs each, with stairs, slabs and clusters. Gloamwood planks come in 19 patterns. The Gloamwood Bookshelf powers enchanting, and with Chipped it comes in 33 versions.
Then there's the Lapse Block. Power it and it disappears for three seconds, along with every Lapse Block touching it.
Potters and ruins

A villager without a job will take a Patient Kiln as a workstation and become a Potter. Potters buy clay, honey and Duskbloom petals, and sell bricks, terracotta and aged goods. Master Potters will sell you the Patience sherd and trim.
Out on plains, savannas and badlands you can find old potters' yards: a ring of broken brick round a hearth, with a Patient Kiln someone sealed ages ago and never came back for. Whatever's inside is long done. Brush the gravel nearby too.
The Patience Pottery Sherd also turns up now and then in trail ruins and desert wells.
Guide book

If you have Patchouli, a book and a clay ball make A Slow Almanac, which covers everything in the mod.
Mod compat

You don't need any of these. If you have one installed, the kilns learn recipes for its stuff, and those foods only show up in the creative tab when that mod is there. The days below are for the Patient Kiln. The Long Kiln takes three times as long but does a whole stack.
With Twilight Forest, any of its berries (raspberries, blueberries, torchberries and the rest) come out as a jar of preserve after 4 days. Cooked meat, pufferfish and tropical fish turn into Twilight Forest's own jerky in 3 days, a hydra chop cures in 5, and castle brick, underbrick and mazestone brick go mossy in 4 or 5.
With The Undergarden, dweller steak, gloomper legs and cooked gwibling cure in 3 or 4 days, ditchbulbs become preserve, droopfruit gets candied and glitterkelp dries out. Blisterberries go rotten after 2 days, and depthrock and shiverstone bricks crack after 3.
With The Aether, white apples become cider and blue or enchanted berries become preserve after 4 days. Aechor petals steep into a tea in 2 days, and drinking it gives you 30 seconds of slow falling.
With Aerial Hell, its berries and shadow fruit make preserve in 4 days, cooked phantom and turtle meat cure in 4, stellar bread becomes rusk and stellar sugar cane becomes rock sugar. Rotten leather and venomous snake skin turn into normal leather, and stellar cobblestone, mud bricks and shadow catacomb bricks go mossy.
Rechiseled's chisel can cut the shard blocks and Gloamwood planks into their other designs. Without it, the stonecutter does the same job.
Chipped's carpenter's table turns a Gloamwood Bookshelf into a Gloamwood version of any of Chipped's 33 bookshelves.
Create's funnels and belts can load and empty the kilns the same way hoppers do.
JEI shows what every item turns into in a kiln, how many days it takes and what weather it needs.
Jade shows how long a kiln, the Sandglass or the Keepsake Urn has left when you look at it.
Patchouli lets you craft A Slow Almanac from a book and a clay ball. It's an in-game guide to the whole mod.
KubeJS lets pack makers add or remove kiln recipes from scripts. There's an example in the next section.
For pack makers
Every kiln recipe is data. There's one recipe type, slowlight:ageing:
{
"type": "slowlight:ageing",
"ingredient": { "item": "minecraft:honey_bottle" },
"result": { "id": "slowlight:mead", "count": 1 },
"days": 2
}
long_days is optional and sets the Long Kiln's wait. cellar_days is optional and sets a shorter wait in a dark cellar. condition is optional too and makes the days only count in the right conditions: - sky: open or covered - weather: clear, rain or thunder - time: day or night - moon: full or new - climate: cold - light: dark (a cellar: no sky above and light 7 or less) - dimension: a recipe that names a dimension only exists there, and beats one that doesn't. That's how cobblestone goes mossy in the Overworld but turns to blackstone in the Nether.
Drop a recipe into data/<your pack>/recipe/ and the kiln can make it.
With KubeJS, event.custom({...}) works, and so does event.recipes.slowlight.ageing('4x minecraft:bone_meal', 'minecraft:rotten_flesh', 2). Slowlight doesn't depend on KubeJS, so nothing breaks without it.
Made by Oculifelis.
The Pressed Flower petal shapes are cut from vanilla Pink Petals and Wildflowers, Lithoform's wisteria petals and petal litter (Apache-2.0), World of Wonder's mellow petals (LGPL-3.0), and Cosmopolitan's and Maple's petals (MIT).
Project description from CurseForge.
Pick your setup
Slowlight by Minecraft version and loader
Choose the version and loader you play, then open the matching release.
26.3
1 loader build26.2
1 loader build26.1.2
1 loader build26.1.1
1 loader build26.1
1 loader build1.21.1
1 loader build1.20.1
1 loader build1.20
1 loader buildCheck the dependencies, then try the file in a copied instance before changing a world you care about.
Recent files
Slowlight versions and loaders
slowlight-0.9.1+1.20.1-forge.jar
slowlight-0.9.1-1.20.1-forge.jar
11 Nov 2026
slowlight-0.9.0+1.20.1-forge.jar
slowlight-0.9.0-1.20.1-forge.jar
9 Nov 2026
slowlight-0.8.2+1.20.1-forge.jar
slowlight-0.8.2-1.20.1-forge.jar
7 Nov 2026
slowlight-0.8.0+1.20.1-forge.jar
slowlight-0.8.0-1.20.1-forge.jar
6 Nov 2026
Looking for an older file? The official CurseForge project page is in Resources.