April 2026 — Mojang has released snapshot 1.26.2 for Minecraft: Java Edition, introducing the Sulfur Caves biome and the Sulfur Cube mob as part of the forthcoming Chaos Cubed update, which is anticipated for full release in June 2026. The snapshot, accessible through the Minecraft Launcher by enabling snapshots in the Installations tab, follows the Bedrock edition preview release of the same update by approximately one week.
As with all testing versions, Mojang advises that snapshots can corrupt world saves, and recommends that players back up existing worlds or run snapshot content in a separate folder before testing.
What’s New: Sulfur Caves Biome
The Sulfur Caves is a new underground biome introduced in this snapshot. According to information published alongside the update, it can be identified from the Overworld by locating Sulfur Springs — surface-level formations that appear directly above the biome’s underground location. Underground, the biome is visually distinctive, with walls composed of Cinnabar and Sulfur blocks that produce a vibrant red and yellow environment.
A new block specific to this biome, called Potent Sulfur, appears beneath water pools found within the Sulfur Caves. Potent Sulfur generates rising bubbles of gas that cause the nausea status effect in players who stand in proximity. The block can also be crafted outside of the biome by combining nine regular Sulfur blocks in a crafting grid, making it accessible to players who want to incorporate its properties into custom builds or game designs.
The Sulfur Cube: Core Mechanic and Behaviour Types
The primary addition in this snapshot is the Sulfur Cube mob, which Mojang and players who have tested the Bedrock preview have identified as the centrepiece of the Chaos Cubed update. The mob is described as slime-like in appearance and movement, but its defining characteristic is a block-absorption mechanic that distinguishes it from existing mobs of that type.
When a block is dropped in proximity to a Sulfur Cube, the mob absorbs it. Upon doing so, the Sulfur Cube ceases autonomous behaviour and instead transitions into what the update documentation describes as a “ball-like” entity. The properties of this transformed state are determined by the type of block absorbed. Players can reverse the transformation and return the Sulfur Cube to its original form by using Shears on it.
According to available update notes, the Sulfur Cube currently supports nine distinct behaviour types, each produced by absorbing a different category of block. Two examples provided in published update information illustrate the range of intended applications: a Sulfur Cube that absorbs wool blocks produces a “light” variant suitable for volleyball-style minigames, while one that absorbs ice-type blocks becomes a fast-sliding variant with movement characteristics suited to curling-style gameplay. The full list of nine behaviour types had not been enumerated in detail in the sources available at the time of publication.
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Slime Block and Bed Mechanic Adjustments
Alongside the new biome and mob, Mojang has made adjustments to existing game mechanics in this snapshot. Slime Blocks have been modified to continuously bounce mobs when air drag is removed — a change that Mojang indicated may produce noticeable differences in how players experience the bounciness of these blocks in existing builds and contraptions. Bed mechanics have also been adjusted, though specific details of those changes were not itemised in the sources reviewed for this article.
These mechanical changes are described as snapshot-stage adjustments, meaning they remain subject to further modification before the full June release.
Known Issues
Several technical issues have been identified in snapshot 1.26.2 and are listed in Mojang’s release notes. These include: shader loaders that only load correctly following a game restart when using the Vulkan rendering backend (MC-307320); a conflict between Vulkan and certain GPU configurations that prevents the game from opening or causes crashes (also MC-307320, with an additional distinct entry at MC-307349 for a crash occurring before the game opens); and a failure of the Exclusive Fullscreen setting to function correctly with the Vulkan rendering backend (MC-307383).
Players using Vulkan as their rendering backend should be aware of these issues before installing the snapshot. Mojang has not specified a timeline for resolution of these bugs in the snapshot stage, though they are expected to be addressed prior to the full release.
How to Install
Snapshot 1.26.2 is available through the Minecraft Launcher for Java Edition users. To access it, players should open the launcher, navigate to the Installations tab, and enable snapshots. A cross-platform server jar is also available for those wishing to run the snapshot in a multiplayer server environment.
The Bedrock edition preview of the Chaos Cubed update has been available for approximately one week at the time of this snapshot’s release, allowing players on that platform to test the same core features in a preview context.
Context: Java vs. Bedrock for Community Development
The distinction between Java and Bedrock editions carries practical significance for the player community beyond technical differences. Java Edition’s architecture is more open to third-party modification, meaning that the Sulfur Cube’s block-absorption mechanic — which by design generates nine distinct mob states — is likely to attract substantial attention from Minecraft’s modding and minigame development communities. The mechanic’s built-in variability, structured around the type of block absorbed, provides a documented and accessible system for creators to build around without requiring additional modification.
The full Chaos Cubed update is anticipated for release in June 2026. Features and mechanics present in the current snapshot are subject to change before that date.