highlighting the edge created by overlaping meshes id like to highlight the edge, created by a plane while moving through an 3d funktion. I cant figure out, how i could create an special material for this line or create an Spline wich i could bevel. Im a bit stuck.



any ideas? thx
Extrude the plane, it needs to be manifold.


Add a boolean modifier to it with the Function object as the object.

Group the plane object, enable Freestyle on the Group with border rendering.