Tectonic Layers

Instead of separate dimensions, the mod builds a single layered world. The Nether lies under the surface, the Overworld occupies the middle band, and the End hangs high above it. Nether and End biomes, terrain, fog, sky and lighting behave as they do in their own dimensions while sharing the stacked Overworld, and portals route players vertically between the layers.

The mod is a beta world generation mod. Its layered terrain comes from a custom layered chunk generator, and it depends on Tectonic Lithostitched as its world generation foundation and on Amplified Nether, which supplies the real Nether source terrain. Both must be installed. Existing worlds keep chunks that were already generated, so a new world gives the most consistent results; backing up a world before installing or updating is advised.

Tectonic Layers is published for NeoForge 1.21.1 only and runs on the client and server. The MIT License covers it, but the project is not open source. Other biome, structure and Nether or End mods may work with it, but compatibility is still experimental and the author intends testing to gather compatibility reports.