Visceral Heap Fix
by RedCraft86
Visceral Heap Fix changes how generated tendons in the Visceral Heap biome of Biomes O Plenty are placed, so they no longer end cut off or stretched.
What it does
In the Visceral Heap biome, tendon features can spawn too close to the floor, get cut off halfway, or be stretched across many blocks. Some blocks are not placed at all, which leaves a disconnected, broken shape. The mod uses a Mixin to alter how these features are generated, which targets those problems directly.
The fix is most visible when Biomes O Plenty is installed alongside a mod that raises the height of the Nether, such as an Amplified Nether setup. Visceral Heap Fix is listed for Forge and NeoForge, and it is open source under the MIT License. Its generation settings are exposed in a config file, so server owners can fine-tune how tendons are placed.
The mod is server-side only, so players join without installing it and only the server needs it. Files exist for 1.20.1 and 1.21.1, with 2.0.2 as the latest release for each.
Key features
Tendon placement fix
Tendons in the Visceral Heap biome are generated without being left disconnected, broken or cut short in most cases.
Mixin-based generation change
The fix works by altering the generation process itself, so the change applies to how features are built in the world.
Configurable generation settings
Several settings related to feature generation are exposed in the config, so the placement can be tuned to a server's preferences.
Known remaining edge case
Some tendons can still stop halfway, but this is rare enough that it does not affect most worlds.
Gallery
Compatibility
Latest build for each game version and loader.
Only full game releases are shown. This mod publishes no snapshot builds.
How it compares
Netherite Tweaks is a client and server option that is not open source, covering 1.20.1 – 1.21.8 under the Creative Commons Attribution Share Alike 4.0 license. Higher Nether is server-side only, not open source, and is licensed under the GNU General Public License v3.0 only for 1.20 – 1.21. Custom World Generation is open source under the GNU Affero General Public License v3.0 or later, with a server-required, client-optional environment and versions covering 1.18.2 – 1.21.
| Mod | Loaders | Game versions | Environment | Updated |
|---|---|---|---|---|
| Visceral Heap Fix | Forge and NeoForge | 1.20.1 – 1.21.1 | Server-side only | 2026-02-03 |
| Netherite Tweaks | Forge and NeoForge | 1.20.1 – 1.21.8 | Client and server | 2025-12-01 |
| Higher Nether | Fabric, Forge, NeoForge and Quilt | 1.20 – 1.21 | Server-side only | 2024-06-14 |
| Custom World Generation | Forge and NeoForge | 1.18.2 – 1.21 | Server required, client optional | 2025-10-13 |
Questions
Does Visceral Heap Fix need Biomes O Plenty?
Does the server need Visceral Heap Fix?
Which loaders does Visceral Heap Fix support?
Can the generation settings be changed?
In the catalog
Visceral Heap Fix is one of 8,515 World generation mods on ModsFinder, and one of 5,058 World generation mods for Forge. 32,366 mods support Minecraft 1.21.1.
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What the author says
If you install Biomes O' Plenty, along with a mod that increases the Nether's height like Incendium or Amplified Nether, you'll notice that if a Visceral Heap biome spawns close to the floor, some of the tendons it generates will either get cut off halfway or will get stretched out so much that some blocks aren't…
Official listing
- Modrinth page
- modrinth.com/mod/visceral-heap-fix
- Owner
- RedCraft86
- Published
- 2025-09-03
- Updated on Modrinth
- 2026-02-03
- Facts verified
- 2026-10-15