ModsFinder

Oushii

by Paulem79

Oushii replaces vanilla TNT explosion raycasting with direct chunk iteration, so large detonations stop stalling the server.

FabricForgeNeoForgeClient or server, optionalGNU General Public License v3.0 or laterOpen source1.18.2 – 26.2

What it does

Oushii is an explosion engine for TNT. Vanilla raycasting evaluates each block position one at a time, which overloads the server during large detonations. Oushii instead walks the loaded chunk sections directly and skips the collision checks that cause the slowdown, while keeping crater shapes realistic through a deterministic 3D hash. Chain explosions of large TNT no longer stall the server.

The mod is aimed at servers and singleplayer worlds that run big TNT setups, where performance mods such as Lithium still leave significant TPS drops. In the author's profiling, a 30×30×30 TNT cube of 27,000 blocks kept server performance near 19.35 TPS, against 5.93 TPS on vanilla, on a 26.2 superflat world with mobs and item entities present. Oushii is compatible with Lithium and other optimization mods, and with custom TNT mods. MidnightLib is bundled inside the mod, and Fabric API is a dependency on Fabric.

Oushii is open source under the GNU General Public License v3.0 or later, and its source code and issue tracker are public. Either side can run it, and neither needs it. Files are published for Fabric, Forge and NeoForge across 15 release versions, 1.18.2 – 26.2.

Key features

  1. Direct chunk iteration

    Explosions walk loaded chunk sections directly instead of testing every block position with raycasts.

  2. Collision checks skipped

    The engine skips the collision checks that the vanilla algorithm performs for each affected block.

  3. Realistic crater shapes

    Crater edges are set by a deterministic 3D hash, so the shapes stay natural while the work is simplified.

  4. Large chain explosions

    Chain reactions of large TNT resolve without stalling the server, even in 27,000-block detonations.

Compatibility

Latest build for each game version and loader.

26.x4 of 4 versions with builds
26.21.0.1+26.2Not available1.0.1+26.2
26.1.21.0.1+26.1Not available1.0.1+26.1
26.1.11.0.1+26.1Not available1.0.1+26.1
26.11.0.1+26.1Not available1.0.1+26.1
1.21.x4 of 4 versions with builds
1.21.111.0.1+1.21.11Not available1.0.1+1.21.11
1.21.51.0.1+1.21.5Not available1.0.1+1.21.5
1.21.11.0.1+1.21.1Not available1.0.1+1.21.1
1.211.0.1+1.21.1Not available1.0.1+1.21.1
1.20.x5 of 5 versions with builds
1.20.61.0.1+1.20.6Not available1.0.1+1.20.6
1.20.51.0.1+1.20.6Not available1.0.1+1.20.6
1.20.41.0.1+1.20.4Not availableNot available
1.20.31.0.1+1.20.4Not availableNot available
1.20.11.0.1+1.20.11.0.1+1.20.1Not available
1.19.x1 of 1 version with builds
1.18.x1 of 1 version with builds
ReleaseBetaAlphaNot available

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

Requirements

Dependencies declared by the latest file for each loader.

Required 1

Fabric APILightweight and modular API providing common hooks and intercompatibility measures utilized by mods using the Fabric toolchain.
Required

Embedded 1

MidnightLibCommon library providing a lightweight configuration system
Embedded

Use cases

Who it’s for: Server owners and players who run large TNT builds on Fabric, Forge or NeoForge, and modders who want an explosion engine that works alongside other optimization mods.

How it compares

Full comparison

Explodee is server-side only, open source under the MIT License, and has files for 1.19 – 26.3 on Fabric, Forge, NeoForge and Quilt. TNT Logic - Realistic Explosion Physics is a client and server mod with a custom license, on Fabric, Forge and NeoForge for 1.20.1 – 26.2. Tnt Limiter is client-side only, under All rights reserved, and Fabric only for 1.19 – 26.1.

ModLoadersGame versionsEnvironmentUpdated
OushiiFabric, Forge and NeoForge1.18.2 – 26.2Client or server, optional2026-08-19
ExplodeeFabric, Forge, NeoForge and Quilt1.19 – 26.3Server-side only2026-10-11
TNT Logic - Realistic Explosion PhysicsFabric, Forge and NeoForge1.20.1 – 26.2Client and server2026-09-27
Tnt LimiterFabric1.19 – 26.1Client-side only2025-12-20

Questions

Does Oushii need Fabric API?

Fabric API is needed on Fabric. Forge and NeoForge builds do not list it as a requirement.

Does the server need Oushii, or can players join without it?

Either side can run the mod, and neither needs it. Installing it on the server alone is enough for its explosion engine to apply.

Which game versions have Oushii files?

Files exist for 1.18.2, 1.19.4, 1.20.1, 1.20.3 – 1.21.1, 1.21.5, 1.21.11, and 26.1 – 26.2.

In the catalog

Oushii is one of 3,545 Optimization mods on ModsFinder, and one of 2,575 Optimization mods for Fabric. 13,894 mods support Minecraft 26.2.

Optimization mods3,545Fabric modsMods for 26.213,894

More from Paulem79

All projects
SimpleOres Recontinued1.19.4 – 26.3Things1.20.1

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What the author says

An explosion engine for Minecraft that replaces vanilla raycasting with direct chunk iteration and simplified TNT physics. It handles large TNT chain explosions without stalling the server while preserving realistic crater shapes. In vanilla Minecraft, large TNT detonations overload the server because the default…
Paulem79, on the Modrinth page

Official listing

Owner
Paulem79
Published
2026-08-19
Updated on Modrinth
2026-08-19
Facts verified
2026-10-15

Tags

OptimizationGame mechanicsMagicTechnology
Open on ModrinthCompare