This mod is no longer supported, as we have moved to datapack for 1.20/1.21. If you want to keep using Nether Islands, check the new datapack page (waiting for approval, will be available soon).
A mod request from a friend to override the Nether's generation and remove the bedrock roof. Designed specifically for Comfy Winter and Better MC Skyblock, but you may include it in any modpack as you want.
I mean, this looks cool as heck (image taken with Oh the Biomes You'll Go)

Configuration
You can configure this mod by editing "config/netherislands.json". It currently only has 2 things to configure though.
- enabled: The global switch of the mod. Default: true
- replacement: The noise generator settings to be used to replace the Nether's original one. Default: minecraft:floating_islands
- noise_override: Whether the mod should override the noise settings. Default: true
- dimension_override: Whether the mod should override the dimension settings. Default: false
- noise_settings: Noise settings to override. This object includes "minY" and "height".
minY: The minimum Y-level of the dimension. Default: 0
height: The world height for the dimension. Default: 256
- dimension_settings: Dimension settings to override.
seaLevel: The sea level (a.k.a. lava level) of the dimension. Setting this to equal or below minY will remove all lava. Default: 0
bedrockFloorPosition: The Y-level of the bedrock floor. Setting this to below minY will remove the layer. Default: -10
The config file should look like this:

Known Incompatibility
- Incendium. The entire generation gets overridden and the bedrock layer is back.
If you have discovered more issues, you may report them on GitHub or join my Discord server.
Note
The 1.19 version of this mod isn't too customizable. Floating Islands generation for the Nether is hard-coded and cannot be changed with config.