Is it possible to have a decal material on a mesh project only down instead of filling out the bounds of the mesh?

I’m currently using a deferred decal material on a mesh that I want to project only straight down, similar to how a decal component works but I havent been able to find a way to do it properly

The decal material i’ve applied on the mesh just fills out the entire mesh bounds and causes some really weird effects depending on the POV of the camera that I’d like to avoid, is there any way I can modify the material to have it project straight down?