{{Infobox version |title=Minecraft 20w49a |image=20w49a.jpg |image2=Java Edition 20w49a.png |edition=Java |type=Snapshot |date=December 2, 2020 |clienthash=818705401f58ee4df2267bf97fa2e0fb6e78ce28 |jsonhash=13ef29a79cc0512e124963fd964e44fd11efe369 |serverhash=2fc0afe1fd31ca872761efbd2a7f635db234b359 |clientmap=141219c3dd05268d559a5e17e8b8f1f0bf982598 |servermap=0b30deba62ef6c2064dfd12f4f46b9d6388d9c8c |parent=1.17 |prevparent=1.16.5 |prev=20w48a |next=20w51a |nextparent=1.17 }} '''20w49a''' is the fourth [[snapshot]] for [[Java Edition 1.17]], released on December 2, 2020,{{snap|20w49a|December 2, 2020}} which adds [[sculk sensor]]s, the [[dripstone caves]] biome, and the ability to expand the world height limit. == Additions == === Blocks === ; [[File:Sculk Sensor JE1.gif|32px]] [[Sculk sensor]] * A new redstone component. * Detects vibrations, and emits a redstone signal. * Emits a different strength if connected to a [[comparator]], and the signal strength is based on the vibration's frequency. * Vibrations can be occluded using [[wool]] blocks. * Can only be obtained via the [[Creative inventory]] or commands such as {{cmd|give}}. === World generation === ; {{BiomeLink|Dripstone caves}} * A new underground [[biome]]. * Made up of primarily [[dripstone block]]s and [[stone]], with large clusters of dripstone blocks hanging from the ceiling, [[pointed dripstone]] on the floor and ceiling and many pools of water. * Does not generate naturally in normal worlds, and can only be generated using [[buffet]] worlds with "Dripstone caves" selected as the source biome or using [[custom]] world. === Gameplay === ; [[Death messages]] * Added death messages for being skewered by a falling stalactite: ** " was skewered by a falling stalactite" ** " was skewered by a falling stalactite whilst fighting " ; [[Particle]]s * New particle types: vibration and dust_color_transition === General === ; [[Tag]]s * Added the dripstone_replaceable_blocks block tag. ** Contains the base_stone_overworld block tag and dirt. ** Used in dripstone generation to determine what dripstone can replace and what pointed dripstone can generate on. * Added the occludes_vibration_signals block tag. ** Contains the wool block tag. ** Blocks in this tag prevent sculk sensors from hearing vibrations if the block is between the sculk sensor and the vibration. * Added new game_events tag type. * Added the ignore_vibrations_stepping_carefully game event tag. ** Contains the step, falling, and shooting projectile events. ** Game events in this tag are ignored by sculk sensors if the source entity is sneaking. * Added the vibrations game event tag. ** Contains every game event. ** Game events in this tag trigger sculk sensors. == Changes == === Blocks === ; [[Pointed dripstone]] * When in a dimension with ultrawarm set to true, such as the [[Nether]], downwards facing dripstone creates lava particles instead of water particles. === Items === ; [[Bundle]] * Fullness is now always shown even if [[advanced tooltips]] are disabled. === Gameplay === ; [[Absorption]] effect * The yellow absorption hearts now stay yellow if the player has the [[Poison]] or [[Wither (status effect)|Wither]] effects, instead of appearing empty. ; [[Freezing]] * Frozen hearts now appear in [[Hardcore]] mode. ** However, they appear the same as normal frozen hearts. === General === ; [[Custom dimension]]s * Added height and min_y variables to dimension types, allowing for the height limit to be increased in custom world settings. ** The [[void]] now starts 64 blocks below min_y. ; Servers * Removed the max-build-height server setting. == Fixes == {{Fixes|fixedin=20w49a |;old |18880|The Absorption effect has no texture for poison/wither hearts (appears empty instead). |46650|When flying through blocks in spectator mode in {{key|F5}}, the camera zooms in and out a lot. |201840|Optional function tags sometimes don't run even when the tag exists. |;dev |203797|Placing or removing a block over the void causes a DecoderException on servers. |204314|Double copper slabs only drop a single slab when mined. |205043|Absorption hearts appear broken when taking freezing damage. |205096|Hardcore hearts lose all color when player is taking freeze damage. |205391|Waxing cut copper does not prevent it from oxidising. |205629|Unused sign cache when rendering signs. |;previous |206553|Pointed Dripstone creates water particles in the Nether. |206563|Pointed dripstone is not connected to the player's hand. |206578|Large pillars of stalactites don't fall when the block above is removed. |206583|Cauldrons below stalactites at least 2 blocks tall will not fill up. |206591|Setting any floating block to a pointed dripstone, causes the replaced block to drop as an item. |206594|Large stalactites falling occasionally do not drop all of their pointed dripstone items. |206606|Frustum stage of stalactites negates fall damage. |206613|Pointed Dripstone duplicates when the block it was attached to is removed. |206615|Pointed dripstone's hitbox can extend further than a block, causing nearby stalactites to not be able to fall. |206642|Stalactites destroy items they fall on, however stalagmites don't. |206643|When a dripstone's hitbox extends into the space of another block, the area that extends into said block cannot be targeted. |206669|Inconsistency between dripstone and non-mob entities. |206682|Floating dripstone tips are sometimes left behind from large dripstone pillars. |206689|Floating pointed dripstone top. |206691|Pointed dripstone replaces items with pointed dripstone items. |206711|Coding error at net.minecraft.world.entity.Entity.resetPos(). |206790|Waterlogged dripstone does not update. |206878|Pointed dripstone attached to a piston is not removed as the piston extends. |206961|Flashing frozen hearts use the poisoned absorption heart texture. }} == Video == {{slicedlime|6t2sjwuzjTc}} == References == {{Reflist}} == Navigation == {{Navbox Java Edition versions|1.1x}} [[de:20w49a]] [[es:Java Edition 20w49a]] [[fr:Édition Java 20w49a]] [[it:Java Edition 20w49a]] [[ja:Java Edition 20w49a]] [[pt:Edição Java 20w49a]] [[ru:20w49a (Java Edition)]] [[th:รุ่น Java 20w49a]] [[zh:20w49a]]