This mod lets you place water anywhere you want (as long as the ground is low enough) without having to connect it to existing water and wait for it to fill. So you can just dig a lake anywhere and fill it up easily.

The water will still be at normal water height (just like the game's normal lakes, rivers, and ocean) no matter where you put it, so if you want a lake on top of a hill you will have to dig down to ground level and the water will only fill the bottom of it. (When you try to place water, the mod will tell you if the ground needs to be lower.)

To make the mod work, first dig out the entire area where you want water. (You can always dig more later, or get rid of some, but it's hard to dig when there's water in it so it's easier to dig the area first before adding any water.) Hold a pearl in your hand, stand in front of any spot where you want water to be placed, and use the pearl (just like you would a tool) on that spot.

This mod should work perfectly fine in multiplayer, but I haven't tested it. If you have issues, file a bug report.

When this mod adds water, it uses the normal game's method, so this mod is safe to remove at any time and your water will be fine.

This is a standard BepInEx 6 mod, so follow the standard Dinkum modding instructions and put the DLL file in your plugins folder.