hide dissapear moving mesh

Hi!

I have a static mesh (the small dark box) that is a plane and i want it to gradually disappear when passing the white wall. The white wall shall not cast any shadows just a helper where the plan shall disappear.

How do I approach this?

Regards steel

You are probably looking at something like this: Dissolve Effect - UE4 Material Tutorial - YouTube
You’d need to create a material that is applied to the box that uses some world positional data to drive it’s opacity.