Java Edition 26.4 Snapshot 1

Minecraft 26.4 Snapshot 1

Edition	Java Edition
Release date	September 22, 2026
Type	Snapshot
Snapshot for	26.4
Downloads	Client (.json) Server
Protocol version	dec: 1073742163  hex: 40000153
Data version	5119
Resource pack format	98.0
Data pack format	122.0
Minimum Java version	Java SE 25
◄◄  26.3 26.4 26.4 Snapshot 1 26.4 Snapshot 2 ►

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    "footer": "<table style=\"margin: auto; word-break: break-word;\">\n<tr style=\"background: inherit;\">\n<td style=\"padding: 0.4em\" rowspan=\"2\">[[Java Edition  26.3|<span style=\"margin-right:-0.35em\">◄</span>◄   26.3]]</td>\n<td style=\"padding: 0.4em\">'''[[Java Edition 26.4|26.4]]'''</td>\n<td style=\"padding: 0.4em\" ></td>\n</tr>\n<tr style=\"background: inherit;\">\n\n<td style=\"padding: 0.4em\">''' 26.4 Snapshot 1'''</td>\n<td style=\"padding: 0.4em\">\n[[Java Edition  26.4 Snapshot 2|  26.4 Snapshot 2 ►]]\n</td>\n</tr>\n</table>"
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26.4 Snapshot 1 (known as 26.4-snapshot-1 in the launcher) is the first snapshot for Java Edition 26.4, released on September 22, 2026, which switches the default game renderer to Vulkan, makes minor changes and fixes bugs.

Additions

General

Tags

• Added the #generated_in_below_zero_retrogen biome tag.
  • Contains biomes to generate below worlds that predate Caves & Cliffs.
• Added the #is_cave collection tag.

Changes

Blocks

Brown mushroom and red mushroom

• Can now be placed on any block with a top solid face regardless of lighting conditions.
  • They still cannot spread unless the brightness at the new growth is less than 13, or its support block overrides light requirements, like mycelium.

World generation

General

• Upgrading worlds from before Caves and Cliffs will now also generate sulfur caves below old chunks.

Features

• Changed straight_trunk_placer
  • Added the trunk_width field.
    • Optional int provider, the width of the trunk centered around the origin.
      • Defaults to 1.0

Material conditions

• Updated minecraft:steep
  • No longer considers height modifications from eroded badlands "surface extensions" in an order-dependent way.

Noise settings

• The default_block field has been removed.
  • This is now always air – any other block should be defined by the material rule.​^{[more information needed]}

Placed features

• The possible domain in the XZ plane of placed features included in biomes is now validated.
  • Feature placement can only occur within a 3×3 chunk region: as such, it is not valid for a Placed Feature to select a position outside of that range.
  • Note: the size of the feature itself is not currently taken into consideration, which may still overflow the chunk.

Placement modifiers

• Changed cuboid
  • xz_size and y_size have been adjusted to represent the actual size of the cuboid, instead of implicitly being 1 block larger.
    • As such, an xz_size of 2 will actually produce a 2×2 cuboid instead of 3×3.
• Changed fixed_placement
  • positions now requires at least one element.

Command format

General

• NBT conversion from floating point types to integer types now always converts to the closest possible valid number after rounding down.

/fillbiome

• Will now fill biomes with block accuracy.

General

Data pack

• The pack format version is now 122.0.
• Entries for different biomes in multi-noise biome sources can no longer overlap across all noise parameters with the same offset.

Dedicated server properties

• Added allowed-connection-ids
  • A list of comma-separated ids.
  • If non-empty, the server will match the values against _id property in minecraft:intent packet.
    • If there is no match, the server will reject the connection.
  • This works both for both status and login connections, so any user connecting without the correct _id in the server address will not see the status and will not be able to join the server.
• Added status-contact-details field
  • If non-empty, the value of this field will be sent in the minecraft:status_response packet JSON payload under the contact property.
  • This value is meant to be used to signal a way to contact the server owners about the server, even if there is no website or other information about it.
  • This field is meant to be human-readable, but there are no other restrictions on field format.
• Added enable-legacy-status field
  • This option allows disabling existing legacy (pre-1.7) server status and ping protocol handling.
  • To preserve existing functionality, value defaults to true.
  • Note: enable-status needs to be set for any status information (modern or legacy) to be set.

Network protocol

• Added minecraft:mod_list custom packet payload
  • This packet is intended to inform servers about client mods to simplify debugging.
  • Vanilla client sends an empty packet at the start of configuration phase, as it does not know about any mods – that is still a responsibility of 3rd-party modding platforms.

• Modified minecraft:intention packet
  • The host field in the serverbound intention packet can now hold additional parameters (previously it stored only the domain name used for connecting to a server).
    • The new format is similar to URI query strings – the domain can now optionally be followed by a ? character and then followed by key=value pairs separated by a & character.
    • Empty values can be omitted (including = sign).
    • Keys and values are escaped according to the standard URI rules ("percent-encoded component").
    • Keys starting with _ are reserved for vanilla use.
    • Users can now input properties in any "Server Address" field in the server list.
      • Additionally, any address in form of <id>@<host> will be parsed as <host>?_id=<id>
    • If a server uses SRV DNS records, the host field will contain both original and resolved domains.
      • If the resolved domain is different from the original domain, the resolved one will be used as the "primary" one, while the original one will be added as _o ("origin") property.
      • Example host string: redirected domain>?_o=<original domain>:<original port>, while the port field in the intention packet will be set to the resolved port value.
    • The field size has been extended to 1024 characters.
    • Note: since the minecraft:intent packet is unencrypted, properties should not be used for any security-sensitive purpose.

• Modified minecraft:transfer packet
  • Added properties field – a string to string map of properties that will be added to the host field in the minecraft:intent packet sent to the target server.

Options

• "Graphics API" Video Setting:
  • "Default" now behaves the same as "Prefer Vulkan".
  • The game will no longer change the graphics API setting automatically if a startup crash is detected.

Order-Independent Transparency shaders

• The OIT algorithm was simplified by replacing the wavelet-based mathematics with depth bin-based accumulation.
  • Slightly improved performance at least on some devices.
  • Reduced floating point precision issues on average.
  • OIT_WAVELET_RANK shader define was removed.
  • OIT_COEFF_COUNT shader define was replaced by OIT_NUMBER_OF_DEPTH_BINS
  • OIT_COEFF_ATTACHMENT_COUNT shader define was renamed to OIT_TRANSMITTANCE_TARGET_COUNT

Resource pack

• The version is now 98.0.

Fixes

29 issues fixed

From released versions before 26.4

• MC-8959 – The player automatically jumps when pressing against a block while in water.
• MC-44560 – When pushed to the edge of water or lava, entities jump by themselves.
• MC-50749 – Jumping into water against a wall causes the player to bounce.
• MC-123848 – Item frames (and items within) drop atop the block they're attached to instead of under it when removed from a ceiling.
• MC-135211 – Entities automatically jump when falling into 1-block-deep water from certain heights.
• MC-135212 – Entities automatically jump when falling into water of any depth from certain heights.
• MC-262252 – The generation of lush caves and dripstone caves is poorly defined.
• MC-276879 – /data truncates floats when casting to longs, but rounds down in all other cases.
• MC-278651 – The host name in handshake packets for SRV records is inconsistent.
• MC-296053 – Item frames don't update properly when modifying their Facing NBT tag.
• MC-299060 – Setting item frames' direction with commands can cause desyncs.
• MC-303702 – Small gaps still appear in item models.
• MC-307065 – Missing optimization for the side faces of the builtin/generated item model.
• MC-310051 – Floating point cancellation artifacts from bits.fsh.
• MC-310131 – Placeable entities momentarily appear at the wrong location when placed.
• MC-310767 – Pipelines always declare a D32_FLOAT depth attachment format with the Vulkan rendering backend.
• MC-311195 – Placed armor stands are rotated incorrectly for one tick.
• MC-311265 – The world border renders incorrectly from outside.
• MC-311473 – Duplicating items with the scroll wheel in Creative mode can produce ghost items.
• MC-311582 – The texture of desert pyramid maps has one inconsistent pixel compared to the others.
• MC-311726 – The water inside waterlogged copper grates has the falling fluid state property set to true.
• MC-311727 – The check for whether a player is standing on air doesn't use the player's updated position.
• MC-311773 – Red and brown mushrooms cannot be placed at any light level, unlike in Bedrock Edition.
• MC-311786 – Running /test run with a rotationSteps value that is out of range causes an error.
• MC-311788 – Teleporting item frames moves them further than it should visually.
• MC-311818 – Traveling to the End in Spectator mode regenerates the obsidian platform.
• MC-311836 – Minecart sounds are now distorted.
• MC-311859 – Damaged dyed wolf armor no longer shows cracks in the colored parts.
• MC-311966 – The tooltip of the "Quit Shortcuts" option calls the Command key "Cmd".

Videos

Videos made by slicedlime: