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Release date

August 20, 2015

Snapshot for



Client (.json)
Server (.exe)

Protocol version


Data version


15w34b[1] is the eleventh snapshot for 1.9, which was released to fix some bugs from and extend features of 15w34a.

This version was previously removed from the launcher for some time, but was added back in September 2018.


All mobs
  • Give off brown heart particles when hurt.
    • The amount depends on the damage dealt.
Command blocks
  • Improved handling of flow with failing commands.
  • 2 new settings - Unconditional and Conditional.
    • Defaults to unconditional.
    • When conditional is set, it will only execute when the command block behind it was successful in execution.
  • Now supports tab auto-completion.
  • New 'Attack Speed' attribute, generic.attackSpeed, measuring fully-charged attacks per second. Base is 4.0, meaning the bar refills in 0.25s.
    • Swords, pickaxes, and shovels have a modifier of -2.75, resulting in a value of 1.25 (bar refilling in 0.8s).
    • Axes have a modifier of -3.2, resulting in a value of 0.8 (bar refilling in 1.25s).
    • The haste effect increases the attack speed by 10%, while mining fatigue decreases it by 10%.
  • Armor points now depend on armor durability.
    • When armor reaches half durability, armor points will go to 1 (half an armor bar).
Minecarts with command blocks
  • Now have the impulse command block variant texture.


4 issues fixed
From released versions before 1.9
  • MC-185 – Creating or loading a singleplayer world shows the main menu for a brief second
From the previous development version
  • MC-86619 – Hand moves up and down when scrolling through empty hotbar
  • MC-86625 – When summoning Giants (or Giants already in the game) they are invisible.
  • MC-86640 – Cursor does not appear on zoomed out / zoomed in maps


Video made by slicedlime: