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Structure Generation Improver (SGI: Foundations!)

by Vivideru

Structure Generation Improver reshapes the terrain around generated structures, filling gaps and adding slopes so buildings sit on the ground.

ForgeNeoForgeServer-side onlyAll rights reserved1.20.1 – 1.21.1

What it does

During world generation the mod checks each structure as it is placed. Where a building would float, show its underside or end at a sheer cut in the terrain, it fills the cavities, builds slopes that adapt to the site and restores surface layers that match the biome.

Exclusions can be set for whole namespaces, such as minecraft.*, or for structure tags in the #namespace:tag form. The changes apply only to newly generated chunks; existing worlds are not modified after the fact.

Structure Generation Improver is server-side only and published for Forge (1.20.1) and NeoForge (1.21.1) under All rights reserved.

Key features

  1. Foundations under structures

    Empty space below a structure is filled, so buildings no longer hang over gaps in the terrain.

  2. Adaptive slopes

    Terrain next to a structure is shaped into slopes instead of leaving vertical cuts around it.

  3. Biome surface rebuild

    Rebuilt ground gets the surface layers of the surrounding biome, so filled areas match the landscape.

  4. Exclusion rules

    Namespaces and structure tags can be excluded, which keeps chosen structures exactly as their authors placed them.

Compatibility

Latest build for each game version and loader.

1.21.12.0.02.0.1
1.20.11.0.41.0.4
ReleaseBetaAlphaNot available

Only full game releases are shown. This mod publishes no snapshot builds.

Questions

Does the mod change worlds that already exist?

No. It works only while terrain generates, so it affects new chunks and leaves existing ones as they are.

Do players need to install it?

No. It is server-side only; in single-player the built-in server runs it.

Which versions are available?

Version 1.0.4 for Forge on 1.20.1 and version 2.0.1 for NeoForge on 1.21.1, both release-channel files from 2026-09.

More from Vivideru

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What the author says

Structure Generation Improver (SGI: Foundations!) enhances Minecraft world generation by dynamically adapting terrain around structures to create natural foundations and smooth environmental integration. Instead of leaving floating buildings, exposed undersides, or abrupt vertical terrain cuts, SGI analyzes each…
Vivideru, on the Modrinth page

Official listing

Owner
Vivideru
Published
2026-02-27
Updated on Modrinth
2026-09-25
Facts verified
2026-10-15
Open on ModrinthCompare