Muddify

It doesn't make sense that you can have dirt adjacent to water.

It also just looks ugly.

This mod converts dirt to mud when beside or below water (but not above, as water isn't a full block). Uses random ticks to trigger a random chance to convert (configurable, defaults to 20%).

I made this for me and my use case. I likely won't ever add features, but I'll keep it up to date as my world updates.