Thanks for the reply. I am using the method to get a SplineResult based on evaluating the spline, but the normal field returned is always (0,0,1). Which is probably correct for the way the spline is set up, but I need the normal of the mesh surface that was generated from the spline. To make things more clear, here is what the mesh looks like and how the spline mesh is configured. I added the red markup to show the normals I want to get.