Create Rain Fix

Keep the weather outside moving Create contraptions.

Create Rain Fix is a lightweight client-side NeoForge mod that prevents rain and snow from rendering through moving Create contraptions.

Trains, elevators, and other roofed contraptions finally keep the weather outside while remaining fully animated.

Before and after

| | Rain passing through the roof of a Create contraption | Rain correctly blocked by the roof of a Create contraption | |Rain streaks pass straight through the roof. |The interior stays dry while rain remains visible outside. |

Features

Blocks rendered rain and snow inside moving contraptions.
Supports trains, elevators, bearings, pistons, gantries, and other Create contraption types.
Uses real collision shapes, including glass, slabs, stairs, and other partial blocks.
Tracks interpolated movement, yaw, pitch, and rotation.
Removes vanilla rain splash particles when they are covered by a contraption roof.
Handles the visible portion of train carriages during portal transitions.
Performs no contraption work while the weather is clear.
Requires no configuration, networking, or server installation.

Create Rain Fix changes client-side weather rendering only. It does not alter rain sounds or server-side wetness and exposure checks.

Compatibility

Component	Supported version
Minecraft	`1.21.1`
NeoForge	`21.1.219` or newer `21.1.x`
Create	`6.0.10` up to, but not including, `6.1.0`
Java	`21` for building
Environment	Client only

The project is built and tested against the official Create 6.0.10 release.

Installation

Install Minecraft 1.21.1 with a compatible version of NeoForge.
Install Create 6.0.10 or another supported 6.0.x version.
Place create-rain-fix-1.21.1-1.0.0.jar in the client-side mods directory.

The mod is not required on a dedicated server and adds no network packets.

How it works

Minecraft normally clips precipitation against the static world heightmap. Create contraptions are moving entities, so their blocks never become part of that heightmap.

Create Rain Fix extends the weather-height lookup with nearby contraptions:

The current interpolated render transform is captured for every relevant contraption.
Each weather column is transformed from world space into the contraption's local coordinates.
A vertical ray is traced against the contraption's actual collision shapes.
The highest hit is merged with the vanilla heightmap, clipping rain and snow at the moving roof.