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BetaDecayTweaks

by mertoalex

BetaDecayTweaks changes how leaves and logs break in Minecraft Beta b1.3_01, so cutting a tree or breaking a block near leaves can remove leaves nearby.

ModLoaderServer-side onlyCustom licenseb1.3_01

What it does

The mod alters the leaf decay logic of the b1.3_01 build. In the first 0.0.1 version, leaves decayed only after the last log of a tree was cut. This release adds extra conditions to the decay check, and the author notes that the exact algorithm was not fully understood when those changes were made. Leaves that lose their support can break as a result, and leaf blocks can be broken by the player as well.

Neighbor block updates drive much of the behavior. Breaking a block can cause a leaf next to it to break too, and a leaf surrounded by air or by other blocks may break immediately. One side effect the author describes is that a single log near a leaf can cause nearby leaves to break when the log is removed.

The mod is listed for ModLoader only, for b1.3_01, with snapshot builds published. Only the server needs it, and players join without installing anything. The author describes installing it as a jar mod, added to the game jar or to the server jar, and notes that a jar file alone is enough on the server. Players should take care when building with leaves while the mod is installed, since decay may happen in unexpected places.

Key features

  1. Changed leaf decay

    Leaves decay under extra conditions, so a tree no longer loses its leaves only after its last log is cut.

  2. Neighbor-triggered breakage

    Breaking a block can cause adjacent leaves to break, and leaves surrounded by air can break right away.

  3. Single-log side effect

    A lone log near a leaf can cause nearby leaves to break when that log is removed.

  4. Jar mod installation

    The mod is applied as a jar mod to the game or server jar, with ModLoader as the loader.

No per-version build data
Modrinth lists game versions for this project (b1.3_01), but the source data has no build per game version and loader, so the compatibility grid is not shown.

Use cases

Server-side experiments

Server owners running b1.3_01 can test the altered decay rules while players join with a vanilla client.

Jar mod study

The mod can serve as a reference for how b1.3_01 jar mods change game logic, as the author describes learning the method with RetroMCP.

Who it’s for: Players and server owners who run Minecraft b1.3_01 with ModLoader and want to experiment with tree and leaf behavior. The mod is early work by the author and changes default leaf logic, so it suits test worlds more than long-running survival worlds.

Questions

Does BetaDecayTweaks need to be installed on the client?

No. Server owners install it, and players connect with no copy of their own. Only the server needs the jar file.

Which game version does BetaDecayTweaks support?

The mod is listed for b1.3_01 only and requires ModLoader.

In the catalog

BetaDecayTweaks is one of 29,952 Game mechanics mods on ModsFinder. 44 mods support Minecraft b1.3_01.

Similar mods

What the author says

i changed logic according to first(0.0.1) version so now it just decays all leaves when you cut tree (only at last log on tree) but it kinda has one sideeffect that when there is one log near any leaf it breaks all leaves near that log when broken so be carefull if you are using leaves on your buildings when this mod…
mertoalex, on the Modrinth page

Official listing

Owner
mertoalex
Published
2026-09-03
Updated on Modrinth
2026-09-06
Facts verified
2026-10-15

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