Java Edition 15w45a

15w45a is the thirty-ninth snapshot released for 1.9. The development team's aim had been to have the 1.9 release feature-complete by the end of October 2015, followed by a period of bug-fixing, and this snapshot was first snapshot during that planned time period of bug-fixing.

This version has been removed from the launcher for quite a bit, then it was added back in September 2018.

Additions

 * Realms
 * Added a Realms Notifications toggle to the Options menu, toggleable to ON and OFF.

Changes

 * Optimizations
 * Tweaks to pathfinding and monster-AI.
 * Some performance optimisations.
 * Shulker
 * Added sounds for shulkers getting damaged
 * Achievements
 * Overpowered is changed from "Build a Notch Apple" to "Eat a Notch Apple".
 * Elder guardians
 * Rare drops now only provide fish, as they had in 1.8 versions, eliminating fishing treasure and fishing junk that had been seen in snapshots.
 * Boats
 * The dark oak boat can now be crafted.
 * Lily pads
 * Collision box was raised from $1/4$ of a pixel to 1 pixel in height.
 * Maps
 * Are crafted at a zoom level of 1:1, as was the case before 15w34a.
 * Can no longer be zoomed in.
 * This reverts maps to 1.8 behavior.
 * Shields
 * Placing a pattern on a shield now consumes the banner.
 * Commands
 * Tab-completed coordinate arguments now become tildes if no block is in focus.
 * NBT tags
 * The  byte tag on ThrownPotion entities has been removed.
 * Instead, the potion will linger if the stored item has an ID of.
 * The following command creates a ThrownPotion lingering potion:
 * The ThrownPotion will render as its stored item, no matter the item.
 * For instance, if the stored item has an ID of, the potion will appear as a diamond sword while being thrown.
 * The Player
 * Jump height increased from $1 3/16$ blocks to $1 4/16$ blocks.

Video
Video made by slicedlime: