set max distance on absorption coefficient for single layer water material

Hi guys, there’s probably a super simple solution to this that my smooth brain hasn’t considered but I’m wondering if anyone can help me with the logic to set a max distance on the absorption coefficient on my water material.

I have multiple layers of my world stacked on top of each other and I’m just looking for a way to cull the effect (x) units from my water plane on the z axis so i can go under it without absorbing all the light from the layers below.

top layer

layer below

how it should look

very basic absorption blueprint (I am definitely not a programmer lol)

any help would be appreciated :slight_smile: