Technical News in Minecraft Snapshot 21w37a

Snapshot 21w37a has a bunch of changes to technical aspects of Minecraft - like a new font, longer scoreboard names and a fair few custom world format changes. Check them all out here! #minecraftemployee

slicedlime works as a Tech Lead for Minecraft at Mojang, but the YouTube and Twitch channels are personal projects run entirely in his spare time. This is an unofficial update video that aims to be the most comprehensive guide possible. Official announcement: https://www.minecraft.net/en-us/artic...

Main gameplay changes video:    • What's New in Minecraft Snapshot 21w3...  

The vanilla worldgen files: https://github.com/slicedlime/example...

Timestamps:
Introduction: 0:00
Pack Format: 0:29
Loot Tables: 0:37
Commands: 0:55
Data: 1:04
Text: 1:55
Tags: 2:10
Performance: 2:21
Custom World Generation: 3:00
Outro: 5:39

Change Highlights in this version:
Pack format:
- Data pack format has been increased to 8

Loot Tables:
- Loot table functions set_contents and set_loot_table now require type field with valid block entity type
- Added new mandatory field type. This type will be written into BlockEntityTag.id, to make sure this tag can be correctly migrated between versions

Scoreboard:
- Removed length limits for scoreboard, score holder and team names

Data:
- Spawners now support the custom_spawn_rules NBT in the SpawnData field and the SpawnPotentials list
- custom_spawn_rules currently may contain fields block_light_limit and sky_light_limit - both are integer ranges with fields min_inclusive and max_inclusive
- To make SpawnPotentials format similar to other weighted lists, structure was changed to {weight: (int), data: (previous contents without 'Weight', 'Entity' renamed to 'entity')}
- To accomodate that change, previous contents of SpawnData were moved to SpawnData.entity (making format of that field same as elements of SpawnPotentials.data)

Debug:
- Information about the world generation noise is now displayed on the debug screen

Fonts:
- Added illageralt, rune-like font from Minecraft Dungeons (currently only usable via commands)

Tags:
- lava_pool_stone_replaceable renamed to lava_pool_stone_cannot_replace

Performance:
- Added startup option --jfrProfile and command jfr to start profiling with Java FlightRecorder as well as a few custom events.
(ref: entire changelog)
- Fixed FPS drops when looking up in a tall world (4064 blocks)

Custom World Generation:
- Noise octave settings have moved out of the multinoise biome source and into the noise settings
- The noises used for MultiNoise biome sources have changed. Altitude has been removed and three new values have been added - continentalness, depth and erosion.
- The prototype versions of features and carvers are now used
- Biomes no longer have depth and scale values
- structure_starts removed
- There's a new mob spawn category called "axolotls"
- 6 new surface builders: grove, lofty_peaks, snowcapped_peaks, snowy_slopes, stone_shore and stony_peaks

- Some ranges now have a short-hand format, you can specify min max as [min, max]

- flower_forest_provider is now noise_2d_provider, can be configured
- list of block states, seed, scale and noise settings
- plain_flower_provider is now noise_2d_cutoff_provider, can be configured
- noise settings, seed, scale, threshold
- two list of block states: low_states and high_states
- a high_chance and a default state
- New block state provider: dual_noise_2d_provider
- noise octaves, seed and scale
- list of states
- variety: range of integers
- slow_noise settings, scale

Vanilla data:
- All the new biomes have been added
- There's a new prototype_cave_extra_underground cave carver
- A number of features are now decorated instead of doing their own decorations, for instance glow lichen

Thanks to JochCool & Vegguid for the assistance!

Some camera sequences rendered using the ReplayMod: https://replaymod.com

Music: "Ethereal" by Approaching Nirvana (   / approachingnirvana  ) - listen on Spotify: https://spoti.fi/2YTba1B
Outro music: "The Fire" by Amarante (http://amarante.bandcamp.com) licensed CC-BY 3.0

Licenses:
- CC-BY 3.0: http://creativecommons.org/licenses/b...
- CC-BY 4.0: http://creativecommons.org/licenses/b...

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#cavesandcliffs #21w37a