Water is a bit hard to make and create in inkarnate without it looking cartoony. In one of the images below I show an example of the different waterfall stamps and line tool assets that are available and most of them seem a bit too cartoonish or unrealistic. They do not translate well to the level of fidelity that inkarnate is known for.

One of the images below is my earnest attempt to create a waterfall and though I think I did ok, assets that have a higher level of detail would make it a lot easier for people to use.