1.Prel - Pre-classic Update

1.Prel (known as 1.prel in the experimental glorious) is an experimental snapshot for 1.20 that changes all features added in pre-Classic.
== Changes ==
=== Air ===
* From y=319, The max build height is increased to y=424, so air can still generate from y=319 to y=423.
=== Grass Block ===
* Can no longer generate in savannas, instead dirt paths are used.
* When going inside in Spectator mode, void air can no longer be seen, as with all blocks, unless a structure void is used.
=== Cobblestone ===
* Renamed to "Cobbled Stone".
* Can now generate below y=14, along with deepslate, making deepslate coal ore a much more common sight.
=== Dirt ===
* Can no longer be obtained by breaking dirt paths or farmland using Silk Touch, instead, the aforementioned blocks drop themself.
* Can no longer spawn from grass blocks' death, instead, mycelium appears.
=== Stone ===
* Stone now has a "stone wall". The "stone wall" has tooltip "block.minecraft.stone_wall" and can only be obtained with /give or /item.
* The stone wall's item texture is missingno, the black and magenta checkerboard.
=== Oak Planks ===
* Mineshafts can now generate on the surface in swamp biomes, meaning spruce planks and spruce fences will appear rather than oak planks and fences.
* Oak planks can now generate in a secret room in toaster bridges.
=== Oak Sapling ===
* When placed in a swamp, it grows into a swamp oak.
* The "stage" block state has been removed and replaced with "age".
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