I made a mod that turns dirt underwater into mud. It also adds new blocks such as Muddy Grass, Muddy Podzol, and other muddy variants of dirt, reworks terrain generation in swamps and jungles, and introduces a new block called Viscous Mud that behaves similarly to Powder Snow. Mod name: Muddy World

https://redd.it/1uzy8n4
@MinecraftModded