Erosion

Erosion is a configurable Forge game mechanics mod that makes blocks change into other blocks when conditions around them are met. Its original purpose was to offer a renewable source of sand and gravel. Over time it grew into a system with many options, and a conditions file controls which blocks erode, what they erode into, and what triggers the change. Once an erosion starts, it can spread to adjacent blocks. Erosion never triggers for players who are nearby, and the mod was written so erosion occurs until a trigger stops it.

Each rule in the erosion conditions file names the source block and its metadata, the block it turns into, the number of game ticks the change takes, and the block that causes it. Metadata values can be listed with commas, a leading exclamation point blacklists values instead, and -1 stands for any metadata value. Both blocks must be given as valid resource locations. Version 2.2 added rain, light and multiple-block requirements to the conditions. The mod is licensed under Creative Commons Attribution Non Commercial 4.0 and is not open source.

Erosion runs on client and server, so both the server and every player need it. Files are published for Forge only, for 1.10.2, 1.11.2 and 1.12, with 2.2.1 for 1.12 as the latest file, released on 2024-11-05.