Change collision channels on landscape spline?

The player pawn has its own channel set to “ignore” as default, I believe causing the player to walk through the spline’s mesh. Any way to change the settings on the landscape spline?

Collision is enabled on the spline.

I would like to know this as well.

I would also like to know this.

me too also trying to figure this out

how do I get the spline mesh to collide with player but not a projectile?