Minecraft Snapshot 20w20b

This week we are releasing a bit of a smaller snapshot. However, if you're into switching game modes and completing advancements, this is right up your alley!

Edit: We've now released 20w20b to fix a bug

Fixed Bug in 20w20b

• MC-183769 NPE in server initialization

New Features in 20w20a

• Added new Game Mode Switcher debug menu
• Added new Nether Advancements

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Game Mode Switcher

New F3 debug feature which allows you to switch game modes with traditional "tabbing" functionality. ​

• Hold F3 and tap F4 to open the menu
• Tapping F4 will cycle the game mode, or you can use the mouse
• Release F3 to apply
• Your last game mode is remembered and will be the first selected option, so you can quickly toggle between two game modes with a single press of F3 + F4!

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F3 + N (Toggle Spectator)

A small change has been made to this debug combination. ​

• By default, using this key would return to Creative after toggling from Spectator. It now will toggle back to the previous game mode you had.
• As an example, if you were in Survival, then toggled to Spectator and back, you would be set back to Survival.

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New Advancements

• Hidden in the Depths unlocks when obtaining Ancient Debris
• Cover Me in Debris unlocks when obtaining full Netherite armor
• Country Lode, Take Me Home unlocks when using a Compass on a Lodestone
• Who Is Cutting Onions? unlocks when obtaining Crying Obsidian
• Not Quite "Nine" Lives unlocks when setting a Respawn Anchor to the maximum
• This Boat Has Legs unlocks when riding a Strider with a Fungus on a Stick
• Hot Tourist Destinations unlocks when visiting all Biomes in the Nether
• Those Were the Days unlocks when entering a Bastion
• War Pigs unlocks when looting a chest in a Bastion
• Oh Shiny unlocks when distracting an angry Piglin with gold

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Changes in 20w20a

• The Bullseye advancement now unlocks when hitting the bullseye of a target block from at least 30 meters away
• The Serious Dedication advancement is now awarded for obtaining a Netherite Hoe
• Obtaining Blackstone now also counts for the Stone Age advancement
• Breeding Striders now counts for The Parrots and the Bats and is now required for Two by Two

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Technical Changes in 20w20a

• Shulkers with "NoAI" can now be summoned with rotation.
• Added thrown_item_picked_up_by_entity advancement trigger
• Added player_generates_container_loot advancement trigger
• Added item_used_on_block advancement trigger
• Removed safely_harvest_honey advancement trigger

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Advancements

item_used_on_block trigger type

Properties:

• item matches the thrown item which was picked up
• entity matches the entity which picked up the item

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player_generates_container_loot trigger type

Properties:

• loot_table matches the resource location of the generated loot table

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item_used_on_block trigger type

Properties:

• location matches the location at the center of the block the item was used on
• item matches the item used on the block

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Miscellaneous trigger changes

• location got a new property smokey which checks if the location is closely above a campfire
• entity_properties got new properties vehicle and targetedEntity which match the vehicle or the entity targeted by a mob

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Fixed bugs in 20w20a

• MC-182967 Throwing ender pearl whilst mounted doesn't teleport you
• MC-179481 Structure block offset can't be bigger than 32
• MC-175992 Striders are not part of the "Two by Two" advancement challenge
• MC-173756 Ice Bucket Challenge advancement can be obtained by collecting obsidian from bartering
• MC-173207 Bullseye advancement can be made when using a non-arrow projectile, even though the description explicitly mentions arrows
• MC-118234 Advancement 'Not Today, Thank You' can be triggered by non-arrow projectiles