Snapshot 25w42a just dropped with some exciting changes and improvements to the game. If you’ve been following along with recent updates, you’ll be happy to know that this snapshot fixes several bugs and introduces a brand new system that gives you more control over your world. Let’s dive into all the details about what’s new, what’s changed, and how you can start testing these features right now.

Table of Contents
What’s New in Snapshot 25w42a
The biggest addition in this snapshot is the Environment Attributes system. This is a game-changer for data pack creators and world builders. It gives you control over visual effects and gameplay mechanics in ways you couldn’t do before.
Think of Environment Attributes as a way to customize how your world looks and behaves. You can now control things like sky color, fog density, water behavior, and even gameplay rules like whether beds work or if water evaporates. The system works through dimensions and biomes, which means you can make each area of your world feel completely unique.
Environment Attributes Explained
The new system lets you set specific attributes for dimensions and biomes. These attributes control everything from visual effects to gameplay rules. Here’s what makes this system special:
- Visual Controls – You can now change fog colors, sky colors, cloud height and opacity, and even ambient particles that float around. Want a red sky in your custom dimension? Now you can do it easily.
- Audio Controls – The system gives you control over background music and ambient sounds. You can set different music for underwater areas or creative mode, and control the volume separately.
- Gameplay Rules – This is where things get really interesting. You can control whether water evaporates, if beds explode, whether raids can start, and tons of other gameplay mechanics. Each biome can have its own rules.
Important Changes and Improvements
Beyond the new Environment Attributes system, this snapshot brings several welcome changes that improve gameplay and fix inconsistencies.
Enchantment Compatibility Fixed
One of the best changes is that Mending and Lunge enchantments now work together on the same item. Previously, these two enchantments were incompatible, which frustrated many players who wanted to use both. Now you can have a spear or trident with both enchantments without any issues.
Visual Improvements
The snapshot improves how underwater fog looks when you’re exploring ocean biomes. Underwater biome fog color and distance now blend smoothly based on your position between biomes. This matches how regular biome fog and sky colors already worked, making underwater exploration feel more natural.
Mob and Entity Updates
Several mobs got useful updates in this snapshot:
- Zombie Horses can now be leashed when you remove their mob jockey. This gives you more control over these rare mobs.
- Nautilus mobs (both regular and zombie variants) can now be controlled while on land. Previously, controlling them outside water was difficult or impossible.
- The “Oh Shiny” advancement has been updated to include the Golden Spear and Golden Nautilus Armor, making it easier to complete if you’ve been collecting these items.

Major Bug Fixes
This snapshot fixes a huge list of bugs that players reported. Here are some of the most important fixes:
- Combat and weapon fixes – Spears no longer keep performing charge attacks every 10 ticks when you use them repeatedly. Fire Aspect on spears can’t ignite victims through blocked attacks anymore. Spears can’t jab through walls now, which was definitely exploitable.
- Mob behavior fixes – Zombified piglins now properly sprint and make angry noises when they’re mad at you. Wolves’ eyes turn red again when angry. Bees get angry at players and mobs like they should. These fixes restore important visual and gameplay feedback.
- Armor and smelting – Blast furnaces now properly smelt nautilus armor. Piglins are attracted to golden nautilus armor as they should be for any gold item.
- Performance improvements – The snapshot fixes extreme TPS lag that happened when using high Lunge enchantment levels with Unbreaking. This was causing serious performance problems on servers.
- UI and visual fixes – Copper chest textures are now consistent across all variants. The mouse cursor properly changes to a hand when hovering over checkboxes and buttons. Sprite components render correctly in server lists now.
How to Install and Test the Snapshot
Ready to try out all these new features? Installing the snapshot is simple and takes just a few minutes. Open your Minecraft Launcher and go to the “Installations” tab. Enable snapshots in the settings, then create a new installation for the snapshot. Make sure you select version 25w42a specifically.
Important warning: Testing versions can corrupt your world files. Always backup your worlds before playing with snapshots, or use a completely separate folder for testing. Don’t use your main survival worlds with snapshots unless you have recent backups.