Minecraft has announced that they have replaced the random number generator that generates worlds and ensures that more seeds are generated as unique. They have replaced the number generator with Minecraft snapshot 21w41a which is a Minecraft java snapshot.
According to Minecraft, snapshot 21w41a will ensure more seeds are unique and it will also move everything around in the world, so expect all worlds to look different in this snapshot.
They've also updated the cubemap, which is a spinning image that appears behind the main menu. It's really nice!
Minecraft snapshot 21w41a will also give new rendering code that looks a lot more like the PC version of Minecraft.
Minecraft snapshot 21w41a is already out, but you won't be able to get it until they release it officially. Be warned! This is a very early Minecraft snapshot and there's a chance it might not be completely stable.
If you reconstruct the world after it has been completely backed up and loaded into a new version of Minecraft, your items may be lost. As a result, It is vital to back up your world before loading it into this snapshot.
Changes in 21w41a
1. The main menu backdrop now features a Caves & Cliffs: Part II scene.
2. Badlands mineshafts generate higher up.
3. The maximum depth of a newly generated geode is now 30 cm, and the frequency with which they appear has been changed to roughly correspond to a base value of 1.17 levels.
4. The angle at which you sprint against a block does not break your sprint has been slightly enhanced.
Technical changes in 21w41a
1. The chunk rendering pipeline has been re-organized.
2. Unfinished chunks should not show up when flying at high speed with a long render distance.
3. They have now implemented a signing procedure for all Server classes.
4. For the Overworld generation, a new random number generator has been added.
Fixed bugs in 21w41a
MC-118134 The texture of oak boards is used for the item's texture.
MC-137950 The texture of their handle does not match the Signs textures.
MC-142385 The texture of the campfire extends into the hotbar outline by one pixel.
MC-148182 The zombie villager's "profession" texture is made out of pixels that are colored like those of a villager.
MC-152506 Faces with old texture may be found on the Wither skull's projectile.
MC-160256 The blocks' texture does not match that of the door items.
MC-166508 Before version 1.15 pre-release 2, Glitchy chunks were not rendered correctly.
MC-173339 The base texture of the Comparators isn't correct.
MC-203155 The GUI for the Enchanting table is made up of an old lapis texture.
MC-225949 Parity problems: different Bedrock and Java sign items have different textures.
MC-227398 On the cave vine texture, there is a misplaced pixel.
MC-230302 There are two pixels missing from the texture of the Glow Item Frame.
MC-236620 The nether biome does not function correctly.
MC-236650 In Minecraft 1.18, there are 2^48 seeds rather than the previous version's 2^64 seeds.
MC-237330 Launching a world created with seed "REDApRES" (0), it crashes when attempting to load new 1.18 mountain biomes. java.lang.NullPointerException: Unable to call "dfw.a(double, double, double)" because "this.a" is null
MC-237457 Stone cliff feature no longer appears on the Snowy Slopes biome in experimental snapshots.
MC-238003 Snow blocks cover stones in jagged peaks.
MC-238561 Axolotls are unable to produce in lush caves(repetition of MC-218701).
MC-238661 The value for InhabitedTime doesn't go up.
Get the snapshot
Minecraft: Java Edition users may download snapshots. To install the snapshot, open the Minecraft Launcher and enable snapshots in the "Installations" tab.
Snapshots may corrupt your world, so please back them up and/or run them in a different location.