Key takeaways
- Minecraft 26.4 Snapshot 4 adds Jukebox Playlists – a chest placed directly above a jukebox becomes its queue.
- Brittle Ice is a new Ice Caves block that cracks and breaks under anything that walks on it, except the Frostbite.
- Zombies, Drowned and Husks are now immune to the Freezing effect, which changes how cold-biome traps behave.
Jukeboxes have worked the same way since 2011. One disc, one block, and somebody has to walk back and swap it every three minutes. It is the oldest unfixed annoyance in the game, and Snapshot 4 of the 26.4 cycle finally deals with it in a way that fits how Minecraft usually solves problems – not with a menu, but with a block placed on top of another block.
The other half of the snapshot keeps building out the winter game drop. Brittle Ice joins the Ice Caves biome as a hazard that only the new hostile mob can walk on safely, and a short list of freezing-related changes tidies up the interactions that Snapshot 3 introduced. Here is what is in it.
How jukebox playlists work
Place a single Chest, Trapped Chest, or any Copper Chest variant directly above a Jukebox. That is the whole setup. The chest’s contents become the playlist.
The rules the system follows:
- Discs play in slot order, starting from the first slot.
- Empty slots and items that are not music discs are skipped.
- After the last disc, the playlist loops back to the start.
- When a disc finishes, the jukebox swaps it with the next disc in the chest rather than ejecting it on the ground.
- If the chest contains no music discs, the disc already in the jukebox simply repeats.
- Ejecting the current disc manually skips to the next available one.
That last point is the one worth remembering, because it turns the jukebox itself into a skip button. Right-click to eject, and the next disc loads.
Design-wise this is a good example of Mojang solving a problem without adding an interface. There is no playlist screen, no ordering UI, no new item. The chest you already use for storage becomes the queue, and the slot order you already understand becomes the track order. Anyone who has ever organised a chest already knows how to use this.
Brittle Ice
The second new block in the snapshot is a hazard rather than a decoration. Brittle Ice cracks when a player or mob steps on it and eventually breaks, dropping whatever is standing on it into whatever is below.
The specifics:
- It generates naturally only in Ice Caves, as part of the crevasse feature.
- Silk Touch collects it.
- It can also be created deliberately – water flowing onto a Blue Ice block turns any water block that borders that Blue Ice horizontally into Brittle Ice.
- The Frostbite mob can walk on it without breaking it.
The craftable route matters more than the generation rule. Blue Ice plus flowing water means Brittle Ice is a renewable trap material you can place anywhere, not just a thing you find underground. Combined with the crevasse generation, Ice Caves now have a floor you cannot trust, and the one mob that lives there can.
That asymmetry is the design point. The Frostbite walking safely over ice that collapses under you is the same trick the Warden uses with sound – the mob is defined by having a relationship with the terrain that you do not. Our write-up on the Frostbite covers the rest of its behaviour, and our Ice Caves coverage covers the biome it lives in.
The freezing changes
Snapshot 3 handed out the Freezing effect freely. Snapshot 4 pulls some of it back:
- Zombies, Drowned and Husks are now immune to freezing and take no damage from the Freezing effect.
- Drowned now turn into a Zombie first before converting into a Frostbite when standing in Powder Snow.
- Frosted Ice now emits a vibration event when it changes state.
- Ice, Frosted Ice and Brittle Ice no longer render their inside faces when placed next to each other.
The undead immunity is a real nerf to a strategy a lot of players were about to build around. Freezing arrows with the five times vulnerability multiplier looked like a cheap answer to zombie hordes, and that specific case is now closed. Our powder snow guide covers how the underlying freeze meter works, and the leather armour rules are unchanged.
The Drowned conversion chain is a small thing with a funny consequence. A Drowned in Powder Snow now has to become a Zombie before it can become a Frostbite, which means the full transformation sequence is drowned to zombie to frostbite, and putting that frostbite back underwater returns it to a zombie. Mojang has quietly built a two-way state machine out of three mobs and two terrain types.
Sound and the vibration detail
Custom sounds were added for Ice, Packed Ice, Blue Ice and Frosted Ice, which is overdue – all four previously used the generic glass sound set. The amethyst block sound set was also renamed to match its sound event names, which is a technical tidy-up rather than an audible change.
Frosted Ice emitting a vibration event on state change is the detail worth flagging for redstone players. Frosted Ice is the block created by Frost Walker boots, and it melts on its own over time. A block that now emits a vibration when it melts is a sculk sensor trigger with a built-in timer, and that is a genuinely new primitive. Our redstone basics guide covers what you can do with a delayed pulse once you have one.
Technical changes
Data Pack version is now 124.0 and Resource Pack version is 100.1. For pack authors the notable items are that a long list of mob sound fields became optional – chicken, cow, cat, pig and wolf sound variants no longer require every field to be specified – and that the flowing_water and flowing_lava fluid types were removed in favour of a single fluid type with level and source properties.
That fluid change is the one that will break things. Any pack or data pack matching on flowing_water specifically now needs to match on water with source set to false. Block predicates gained a state field on matching_fluids to make that possible. Our notes on the earlier pack format bumps cover the pattern these changes follow.
On the network side, the server now disconnects clients more consistently when a packet they sent causes an error. That is a stability fix rather than a feature, but it changes what a malformed-packet bug looks like from the outside.
Our read
Jukebox playlists are the most quietly significant thing in this snapshot. Music discs have always been a collectible with almost no use – you find twelve of them over a hundred hours and play each one once. Giving them a queue turns a collection into a thing you can actually build a room around, and it does it without a single new item.
Brittle Ice is the more interesting mechanic but the narrower one. A floor that breaks under you is only scary in a place you have to cross, and right now that place is one cave biome. If the crevasse feature generates often enough that Ice Caves feel genuinely treacherous, it will be the best hazard added since the Warden. If it generates rarely, it will be a curiosity most players meet twice. The feedback site Mojang opened for the winter drop is where that gets decided.
Images: Winter Overhaul project gallery.