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  • Improvements to Forge invalid loading state response
  • Fix deer antlers having glitchy rendering on some hardware (#156 - thanks, Auroali!)
  • Automatic compatibility with Nether height modifying datapacks/mods that don't properly declare their logical height
    • Which is all of them, as far as we know
    • This includes Incendium and Amplified Nether

If you have been using the "Amplified Nether Height" fix datapack we previously recommended:

  • with Amplified Nether: Keep using it. It fixes vanilla bugs as well.
  • with Incendium: Remove it, as it's designed for a 256-height nether and Incendium is 192-height (we didn't know they were different until today). Leaving it installed makes Chorus Fruit put you on the Nether roof, among other issues.
  • The Metastable ZZAZZ's name is now fully translatable including changing the word order and which words have which color
  • Dyed lamps now use individual color translation strings
    • We're supposed to know better <.<
  • Fixed some reused sound events causing incorrect subtitles
  • Fixed Canister Filler and Rifle Canister Multiplexer still using the old Rifle Canister shapes in slot ghosts
  • Added compatibility with Forge's LanguageHook to Lib39 Dessicant Enhanced Lang
  • Fixed non-fuel items being recognized as fuels that burn for 0 ticks under Forge
  • Added every color of suit helmet to creative index
  • Made Metastable ZZAZZ low ammo noise effect less intense
  • Internal inventory refactors
  • Fixed the Metastable ZZAZZ being unable to hit armor stands
  • Modifying your health via Haemopals now starts from your first heart instead of your last heart
    • This makes it work more or less correctly with other mods providing extra max health
  • Haemopals now have a beating animation like they were always supposed to
  • Efforts to make the jar much smaller (it is now 4.2M, down from 8.7M):
    • Textures are now encoded in JPEG-XL format because it's cool and to make the mod jar smaller
    • Music is now a separately downloaded resource pack to reduce jar size further
    • The main mod is now distributed as a JiJ inside of a "wrapper" mod
    • XM files are now compressed with OggMod
  • Tracing the outside edges of the color circles in the ZZAZZ configuration screen now allows selecting shades of gray
  • Added the Pallor status effect, which makes you vulnerable to sunlight and arthropods
    • Replaces the Hunger effect on Rotten Flesh
    • Every application of the effect increases its level and duration
    • Reimplementation of the "Pale" effect from our old 1.12 mod, Iridescent
    • Makes Rotten Flesh a meaningfully dangerous and mechanically interesting food rather than a self-solving problem ("Just keep eating more flesh until you don't roll the hunger effect")
  • The Pixel Composering continues: New Velresin texture/animation
    • We can't remember where the original texture came from? It may be a median-blurred vanilla texture
    • This now has the rippling effect that the velresin animation was always supposed to have
  • Untagged Black Void Glass as translucent, fixing various render glitches
  • Fixed Rifle Canister Multiplexer not working under Accessories Curios compat
    • Accessories does not properly implement the findFirstCurio API, so we're now doing the inventory scanning logic manually
  • Continuous Platforms no longer activate while in magnetic antigravity
  • Added a new music disc
  • Redesigned the creative menu
  • Creative menu subtabs now support Unicode characters

v9.20.978

by exaptations on Feb 10, 2026
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  • Rebalanced Neodymium — magchambers are now 9x cheaper
    • Break placed Neodymium slabs to reimburse their value, or uncraft Ultradense Slabs/Blocks that you have stored away already
    • You can do this en-masse and in-place using the Continuous Shifter
    • If your server was already running a rebalance patch, add -Dyttr.alreadyRebalancedNeodymium=true to your JVM arguments to make existing slabs not drop 9x the loot
  • Holding a Cleaver in your offhand now inverts the cut orientation
    • This means you can press Swap Hands to invert a cleave rather than figuring out whether your points are clockwise or not
  • New Rifle Canister texture
  • We bought Pixel Composer
    • New Void fluid texture
    • New Spark texture
    • New Delicace block texture
    • New glowstone fluid texture in the Suit Station GUI
    • Added a swing particle animation when blocks are cleaved
  • Fix alignment of textures in Centrifuging EMI plugin
  • Updated Chinese translation (thanks, ChuijkYahus! — #144)
  • Removed all Yttr biomes from #minecraft:is_nether and #minecraft:is_overworld
    • This is to fix an incompatibility with BCLib's "BiomeRepairHelper" which causes these biomes to wrongly start generating outside of the control of our own generation logic
    • This would create very small Wastelands in the Overworld, and cause random broken Scorched Summit/Terminus biomes to spawn in the regular Nether (outside of the Scorched dimension)
    • This will likely break other mods, and we can't really know which ones. Sorry.
  • Fixed builds not being reproducible on machines with a non-UTC timezone
  • Diving suit now renders on armor stands
  • Fixed incorrect shift-click behavior in Boxe® inventory
  • Added a "launch checks" system that will halt game launch early on in these conditions:
    • Running under Connector without Connector Extras
    • Sodium is installed, but not Indium
    • Running under Connector and Forge is in a broken loading state
      • Previously, this would result in a random crash some time late during loading, often java.lang.IllegalStateException: Missing layer definitions: [yttr:deer#main] — this masks the real error and confuses people
  • Removed No Indium in favor of launch checks

v9.20.947

by exaptations on Jan 31, 2026
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  • Fixed rifle scope getting "stuck" when switching off it or hiding the HUD
  • Allowed changing scope state on a rifle that's cooling down
  • Reduce inertia in magchambers
  • Allow sneaking in magchambers
  • Projector blocks can now be dyed
    • Right-click an existing block with dye (does not consume the dye) or hold a dye in your offhand while using the Projector
  • Fixed wearable items being given both Trinket and ICurioItem interfaces when both are present (e.g. Connector)
  • New diving suit item textures by Roselace
  • New Pinching EMI icon by Roselace
  • Fixed diving suit suppressing Ears chest render
  • Added Switchy 3 support for soul colors
  • Don't disable world rendering for Void fluid/diving/etc while in VR (currently can detect Vivecraft and Visor) as this makes the game unplayable
  • Fix liquids destroying scorched portals
  • Refactored LatchHolder to avoid a Mojmap conflict causing heap pollution under Connector
  • Added the Boxe®, a new storage device similar to a barrel that can be dyed any color
  • Fixed XM music discs playing in stereo by moving mono support to Lib39 Keygen (broke in the 1.20 port)

v9.20.929

by exaptations on Dec 22, 2025
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  • Revert Fabric Loom update, fixing Connector support
  • Fixed putting more than 1 neodymium in a jukebox duplicating items
  • Fixed Centrifuge animation being misaligned after the GUI makeover
  • Fixed some more edge cases that could result in the removal of Core Lava (thanks, aqua!)
  • Fixed slot sizes mismatching with inventory textures (vanilla issue, only fixed in Yttr GUIs)

v9.20.927

by exaptations on Dec 18, 2025
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  • Continuous sounds now attempt to follow a melody
  • Fixed item deletion edgecases related to mixing multiple inventory sizes on a single Pinch Glom channel
  • Fixed breaking Big Cuprosteel Conductive Plates while they're powered making them only half break, leaving behind a buggy single block
  • Directional velresin now also multiplies velocity like undirectional does
  • Fixed a crash related to the rifle canister multiplexer (possibly Curios-specific)
  • Do a weird hack with SSDs to maybe get other mods to honor its max stack
  • Fixed Void Effector rendering in the farlands — other render issues in the farlands are unlikely to be fixed and should be considered features
  • Fixed the Spectrum hazardous fluid containment advancement not working
  • Marked Continuous Platforms and Void Glass as impermeable
  • Fixed Pinch Gloms leaving behind a ghost block entity (thanks, Astra!)

v9.20.914

by exaptations on Dec 14, 2025
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  • Fixed air debug rendering being enabled by default on first launch
    • This was causing severe lag. Extremely sorry this shipped in "release" builds.

v9.20.913

by exaptations on Dec 14, 2025
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  • Prefer Curios if available
  • Minor redesign of Terminus Houses
  • Fixed Terminus Houses not generating

v9.20.911

by exaptations on Dec 12, 2025
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Hotfix.

  • Tightened Minecraft version dependency
  • Added Connector dummy mod
  • Fixed other mods breaking depth test on the Pinch Point
  • Increased resolution of Pinch Point distortion map
  • Fixed Pinch Glom advancement being granted by any item

v9.20.908

by exaptations on Dec 11, 2025
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This release is way too big but it's been blocked for a while on the Scorched rework. Please enjoy, and report bugs.

New Features:

  • Major rework to the Metastable ZZAZZ (existing items will be converted)
    • It is now intrinsically bound to you and can be summoned at any time when your hands are empty, even immediately after respawning
    • Its colors can now be customized
    • New theming
  • The Scorched Summit is now an independent dimension, accessed by using the Void rifle mode on the new block that covers the Nether: Upstrate
    • This makes the Summit a progression gate and resolves various worldgen incompatibility issues
    • For compatibility with Amplified Nether, you must also install this fix datapack that makes it properly declare the logical height: https://modrinth.com/datapack/amplified-nether-height
    • Terminus Houses have been ported over to the new dimension, but entirely new and more interesting worldgen is pending to replace them
  • Sneaking while placing a Screeper Nest will now place it facing away from you
  • Redesigned the Wasteland generator so it actually functions again
  • Added the Pinch Point, a new crafting station crafted with a Spark
  • The Metastable ZZAZZ is now crafted at the Pinch Point
  • Added Pinch Gloms, a way to quantum-entangle inventories in the same dimension across any distance
    • This is the Yttr spin on Tesseracts/Ender Chests/wireless redstone/et al
    • Inventories must be tagged as "glommable" for this to work
  • Most GUIs have been redesigned with a new art style that we believe still fits in fairly well with vanilla
  • Added the Index, an 81-slot inventory that can only have up to a stack of any given unique item type and remembers what items went in which slots
    • Yttr's take on a rationing pipe, effectively
    • Works great in combination with Pinch Gloms

Highlighted Changes:

  • Fixed light air not allowing blocks to be placed in it and blocking tree growth
  • Added an option to change between worldspace and cameraspace controls for magnetic antigravity
  • Graspers now reduce their range on a redstone signal, instead of turning completely off. Every unit of power reduces the radius by one block, meaning a signal >=12 is needed to turn them off\
  • Plastic potions can now be dyed to change the resulting antler color
  • Fixed Metastable ZZAZZ ranged shots not going through flowers/tall grass
  • Made the Projector 2.5× faster
  • Fixed lamp recipes not working consistently
  • Lazors now only blind you if you're actually looking into them (thanks Alwinfy)
  • Increased the vertical range of the Screeper Nest from 32 to 48
  • Fixed DSUs letting you click >64 stacks out of them
  • Chutes now do not dispense items into rails so they can be used for minecart stations

And The Rest:

  • Fixed some localization errors with rifle backfire
  • Fixed Diffractor cloaking causing crashes with some other mods
  • Malum compatibility for the Screeper Nest
  • Added an internal abstraction for items that contain items, currently only used by the Shifter
    • If Spectrum is installed, this will share its registered "ItemProvider"s
  • Chutes are now one tick slower, but are real inventories and won't dupe things anymore
  • Graspers now properly check restrictions of inventories they insert into
  • Really hacky workaround for the Dopper and Flopper not working correctly
  • Fixed creative tabs not initializing correctly, preventing lamps from showing in EMI
  • Fixed Diffractor uncloak sound being global for others in multiplayer
  • Restored Diffractor control hints (broke in the 1.20 port)
  • Added a ton of new advancements
  • Added some new stats:
    • Blocks projected with the Continuous Projector
    • Game events suppressed with the Continuous Diffractor
    • Distance traveled in magnetic levitation
    • Volume of mercury drank
    • Volume of plastic eaten
  • Increased the stack limit of Aware Hoppers and Incomplete Graspers
  • Added EMI world interaction recipes for Dry Ice water interactions
  • Cage lamps are now blast resistant
  • Fixed some DSU logic bugs (thanks Villhume)
  • Fixed a Levitation Chamber render crash under Sinytra Connector (thanks Villhume)
  • Finally fixed rifle teleportation clipping you part-way into blocks
  • Flopper model improvements
  • Added a yttr:unvelic entity tag for preventing Hypervelic Resin impulse
  • Fixed the Continuous Projector not casting when clicked onto an immortalized Platform block
  • Many fixes to the Centrifuge's usability in automation, such as allowing buckets to be pulled out
  • Snares now tick status effects
  • Spectrum Velvet Magic now affects Snare timers
  • All Snare status effect handling now uses tags
  • Fix game crash when OpenGL Compat Profile doesn't initialize correctly and something that uses it renders (e.g. Sinytra Connector, Continuous Shifter)
  • Continuous Platforms trinket no longer activates while in water
  • Bugfixes related to Continuous Platforms trinket rendering
  • Diamonds are now flammable
  • Fix Continuous Diffractor not always setting cooldowns
  • Fix Void fluid being displaced by water
  • Plated chutes can now support rails and similar blocks
  • Fixed Yttric Rifle centrifuge and ammo bar not being visible in the left hand
  • Control Hints have been moved to a new Lib39 module: Wrangle
  • Vorpal is no longer tagged as a treasure enchantment
  • Added "sketch" recipes to EMI that display obscure mechanics in a somewhat mysterious manner
  • Added EMI integration for the canister filler
  • Which blocks fall when a Root of Continuity is broken are now a customizable tag instead of hardcoded to End Stone
  • Added native Curios support when running under Connector
  • Haemopal holsters are now legally unbreakable which should fix various mod interactions
  • Bugfixes for big blocks and centered placement (thanks Astra)
  • Split out the substitutions system into a Lib39 module
  • Start internally refactoring items to use something that resembles 1.21 components
    • Don't hold your breath for a 1.21 port, though.
  • Reworked the Crafter Rafter, making it function properly again and be larger
  • Unmark the Diving Suit as magnetic
    • Yttrium is not magnetic
  • Added deer, a cute passive mob that wander around and eat flowers
  • Added EMI aliases for searchability — originally implemented in 1.16 with annoying stilted tooltips
  • Fix many animations not being smooth
  • Fix untranslated string in Piston Smashing recipes
  • Reorganize creative tabs
  • Made Core Lava considerably less unstable
  • Fix config menu animation when clicking a button on the left side of the screen
  • Fix crash when Trinkets isn't installed
  • Make IR lazors visible
  • Gadolinite now gives half as much iron
  • Added Nooch, a cheese substitute obtained by smashing End Stone
  • Added Dry Ice, which can be used to supercool Neodymium to allow creative-like flight for players wearing magnetic armor
    • Obtained by drying out Blue Ice in the End with no solid blocks around it
  • License for code is MIT again
  • New custom diving suit model somewhat inspired by a drawing by Aquaholic
  • Added the Grasper, an abomination that picks up items within its range, and stows them in an associated inventory
    • The Studious Grasper only picks up items that are already in the inventory
  • Added plastic potions, which gives you randomly generated antlers when drunk
  • Tons of assorted bugfixes
  • Added integration with Spectrum and Revelationary

Yttr now officially supports Sinytra Connector thanks to effort by unilock.

  • Added deer, a cute passive mob that wander around and eat flowers
  • Added EMI aliases for searchability — originally implemented in 1.16 with annoying stilted tooltips
  • Fix many animations not being smooth
  • Fix untranslated string in Piston Smashing recipes
  • Reorganize creative tabs
  • Made Core Lava considerably less unstable
  • Fix config menu animation when clicking a button on the left side of the screen
  • Fix crash when Trinkets isn't installed
  • Make IR lazors visible
  • Gadolinite now gives half as much iron
  • Added Nooch, a cheese substitute obtained by smashing End Stone
  • Added Dry Ice, which can be used to supercool Neodymium to allow creative-like flight for players wearing magnetic armor
    • Obtained by drying out Blue Ice in the End with no solid blocks around it
  • License for code is MIT again
  • New custom diving suit model somewhat inspired by a drawing by Aquaholic
  • Added the Grasper, an abomination that picks up items within its range, and stows them in an associated inventory
    • The Studious Grasper only picks up items that are already in the inventory
  • Added plastic potions, which gives you randomly generated antlers when drunk
  • Tons of assorted bugfixes
  • Added integration with Spectrum and Revelationary

v7.19.699

by exaptations on Jan 23, 2025
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  • Added the Metastable ZZAZZ, a glitchy weapon that's a combination sword/gun, refilling gun ammo by doing melee (or throwing the weapon itself like a grenade)
    • Obtained by blowing up a Bedrock-Reinforced Yttric Rifle, Reinforced Void Cleaver, and Spark.

Also probably other stuff, I have no idea. 2024 was a very bad year for me and I don't remember what else might have changed.

v7.20.761

by exaptations on Jan 23, 2025
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  • Pretty experimental 1.20.1 port, originally scrapped together for Blanketcon 23 and refined to the point of decent survival usability by unilock.
  • unilock has put SO MUCH work into this. This wouldn't exist without them.

It's been so long since I touched Yttr (2024 was a very bad year for me) that I legit have no idea what changed and what is still broken. Sorry.

  • Tag lazor beams as air blocks so that trees can grow through them
  • Added more inanimate entities to the screeper_immune tag; minecarts, armor stands, xp orbs
  • The following only apply if you use a datapack to add spawners to the yttr:snareable block tag:
    • Snared spawners will continue to tick, spawning mobs
    • Snared spawners are no longer stable, breaking containment after ~2:20
  • Removed some obsolete mixins and utilities now handled by Lib39
    • Might fix networking jank
  • New texture for carbon blocks
  • Haemopal is now a piece of your soul
  • Continuous Platform blocks are now broken with left-click, and break instantly if not immortal
  • You can now replace your soul with soup
  • Fixed lazor emitters being half waterloggable
  • Added Continuous Platforms, a new sole-slot trinket that lets you sneak to walk on air anywhere
  • Fixed ore recipes not recognizing deepslate ores
  • Fixed cleaved block mesh caching
  • Fixed rifle scope persisting when switching items
  • Rifle now unscopes on overcharge
  • Fixed cleaved block collision sometimes bugging out
  • Reimplemented Disjunction and Vorpal to be less janky
  • Disjunction now uses the #yttr:disjunctible entity tag instead of being hardcoded
  • Control hints are no longer blurry on some GUI scales alongside QDAA
  • Updated Lib39 to 1.5.0-pre3
  • Fix Shifter-immortalized Continuous Platform blocks keeping their speedy state
  • Added the Continuous Diffractor, an active cloaking device that's better than invisibility potions
  • Fix on servers. Again
  • Added a new "Break Bedrock Anywhere" config option

v7.19.638

by exaptations on Dec 25, 2022
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v7.18.626

by exaptations on Dec 25, 2022
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  • Hypervelic Resin now has no collision, allowing pushing items in from the side or transferring from ice streams
  • Various mechanisms are now valid bases for Hypervelic Resin (such as pistons and hoppers)
  • Glowdamp can now be thrown, creating a cloud of temporary light and harming undead
  • Glowdamp now stacks to 64 (consistent with Dragon's Breath)
  • Transferent Fungus spore placement on piston retraction is now much more reliable
  • Added IR lazors, which are invisible, do not emit light, and do not harm entities, but are still detectable with redstone
  • Added missing EMI recipe defaults
  • Slightly reduced lazor brightness for less lag; the full 15 isn't necessary with 1.18 spawn rules
  • Possible fix for dyed project tables not showing as dyed in some cases
  • Chutes can now be put below replicators to intelligently keep dropped items stocked

External resources


Project members

exaptations

Perpetrators

unilock

1.20 Porter & Serial Bugfixer

BluKat

Occasional Artist & Designer


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