Void Worldgen

This worldgen data pack infinitely generates a void world with properties akin to the original SkyBlock. This means all structures (that matter) will generate with their bounding boxes at the same location as if the world with the same seed was generated with normal terrain. End portals and sculk sensors generate in the world to enter the end and obtain sculk.

Structures

All structure bounding boxes will generate (i.e. no blocks will generate) at the same coordinates along with some entities as they would in a normal world with the same seed. Below is a list of notable structures:

Ancient Cities will generate the same bounding boxes (mobs will not spawn in the bounding box) and sculk shriekers that can spawn wardens (location of shriekers won't match with a normal world)
Ocean Monuments will generate the same bounding box (guardians farms can be built as normal); elder guardians will generate, but immediately fall into the void
Pillager Outposts will generate the same bounding box (pillagers will spawn in the bounding box) with any allays that normally generate
Strongholds will generate the same bounding box with the end portal in the same location (though the eyes won't always match with a normal world with the same seed)
Witch Huts will generate the same bounding box (witch farms can be built as normal)
Mansions will generate any allays that would generate in a normal world
Nether Fortresses will generate the same bounding box (spawner-less fortress farms can be built as normal)
End Cities will generate any shulkers and ships that would generate in a normal world
Trial Chambers will generate the same bounding box (mobs will not spawn in the bounding box)

The End Dimension

In the end dimension, the obsidian pillars and the exit end portal generate as normal. When a player goes through an end gateway, a small end island will still generate, but the rest of the outer end islands will not.

Other SkyBlock Packs

My SkyBlock Collection has additional options for void worldgen. Most notably there are other presets that have the stronghold generate with the pit of lava beneath the end portal, or the entire portal room. There is also a preset that removes all blocks and entities, leaving only a biome map with structure bounding boxes. Additionally there are a few data packs to generate a default skyblock island upon creating the world.

Compatibility

This datapack is automatically compatible with any datapacks that only add structures to the world, such as Dungeons and Taverns, Structory, and Explorify. Any datapacks that modify worldgen using only density functions and noise are automatically compatible, such as Tectonic and Continents. Datapacks that modify worldgen in other ways or modify or add biomes are incompatible without an extra compatibility patch. The following compatibility patches are available: