Resolved Depth difference in world units

EDIT: Nevermind! My mistake. I added multiplier to the depth, it caused this behavior.

How can I get depth difference between screen and fragment (buffer and currently drawn pixel) in world units so it is not dependant on distance from the camera?

I see everyone doing water edges this way:



But the result looks very different at different distances.





In Amplify editor I think that depth difference was constant.. What can I do to achieve a consistent look? Manually adjust for distance?