Detail this asset from Unity Store: Original Link
This is a paid asset, but now you can download Water Utils Free.
Water Utils v1.1.1
Do you want to add a waterline on a object ?
Do you want to float objects on water?
Do you want Skybox horizon adjustment ?
Do you want to fade 2 Skyboxes ?
This asset makes it possible.
Light weight, mobile ready.
[ver. 1.1.1 update] Fix some warnings for Unity 2017 or later. [waterline]
Add waterline to Object. You can attach second material as waterline. and can customize water height / waterline width / ampritude / color in Material parameters.
[objects on water]
StandardAssets>Environment>Water>Water4 is including vertex move shader, but we don’t know that wave height. this asset can take the wave height and you can put objects on water.
[Skybox horizon adjustment]
Normally skybox horizon is zero. but sometimes we want to change horizon height. this asset can adjust horizon height on material parameter.
[fade 2 Skyboxes]
this asset including “fade 2 skyboxes”shader. you can select 2 cubemap skyboxes and fade it on material parameter.