ModsFinder

Pixel Physics and Logic

by Pixel Pub

Pixel Physics and Logic gives Fabric blocks structural physics, so dirt, sand and gravel need support to stay in place.

FabricClient and serverAll rights reserved1.21.4 – 1.21.11

What it does

Without proper support, blocks such as dirt, grass, sand, gravel, clay, moss and cobblestone collapse, and heavier blocks do not float in the air. Minecraft normally allows impossible floating structures, and this mod replaces that with lightweight structural rules. Planks, logs, stone, bricks, iron blocks and light soil held nearby count as strong supports for a structure. Underground, unstable soil gives cave-in warnings before it gives way.

Every player and the server need a copy of the mod. Files are published for Fabric only, across 8 release versions 1.21.4 – 1.21.11, under All rights reserved and not as open source.

Key features

  1. Structural block physics

    Blocks that lack support collapse, which keeps basic construction and mining logical without hardcore simulation.

  2. Cave-in warnings

    Unstable soil underground shows warnings before a cave-in, so miners can react before blocks fall.

  3. Support counting

    Planks, logs, stone, bricks and iron blocks give strong support, whereas dirt and sand depend on soil held nearby from the side.

  4. Soil and slab drops

    Sand slabs and dirt slabs drop soil when broken with a shovel, linking the physics to gathering.

Compatibility

Latest build for each game version and loader.

1.21.110.1.0
1.21.100.1.0
1.21.90.1.0
1.21.80.1.0
1.21.70.1.0
1.21.60.1.0
1.21.50.1.0
1.21.40.1.0
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

How it compares

Full comparison

Unpath is open source under the MIT License and runs on client and server for 1.21 – 1.21.8. Gravel to Sand is server-side only, licensed under the Creative Commons Attribution 4.0 license, and covers 1.21.10 – 1.21.11, so it fits servers that do not need client changes. Slab Manager is open source under the CC0 1.0 Universal license and targets only 1.21.11.

ModLoadersGame versionsEnvironmentUpdated
Pixel Physics and LogicFabric1.21.4 – 1.21.11Client and server2026-07-30
UnpathFabric1.21 – 1.21.8Client and server2025-08-02
Gravel to SandFabric1.21.10 – 1.21.11Server-side only2026-03-07
Slab ManagerFabric1.21.11Client and server2026-02-23

Questions

Does Pixel Physics and Logic need Fabric API?

Yes. Fabric API is required, and the mod is published for Fabric only.

Does the server need the mod for players to join?

Installation covers the server and each player's game.

Can Pixel Physics and Logic be ported to other loaders?

Other loaders such as Forge, NeoForge and Quilt may host ports, provided each port names Pixel Pub's original project as its source.

In the catalog

Pixel Physics and Logic is one of 29,952 Game mechanics mods on ModsFinder, and one of 19,630 Game mechanics mods for Fabric. 19,862 mods support Minecraft 1.21.11.

Game mechanics mods29,952Fabric modsMods for 1.21.1119,862

Similar mods

Better Third Person1.16.4 – 1.21.8Sounds1.20 – 26.3Cut Through1.18.2 – 26.3Bad Wither No Cookie - Reloaded1.12.2 – 1.21.10Carpet1.14.4 – 26.3Client Tweaks1.12.2 – 26.3

What the author says

Pixel Physics and Logic — небольшая самостоятельная часть большого проекта More Better Pixels для Minecraft 1.21.4 (Fabric). Minecraft позволяет строить огромные конструкции без какой-либо логики.
Pixel Pub, on the Modrinth page

Official listing

Owner
Pixel Pub
Published
2026-07-30
Updated on Modrinth
2026-07-30
Facts verified
2026-10-15

Tags

Game mechanics
Open on ModrinthCompare