I’m trying to get my road to sit flush on my landscape. There are various size gaps between the landscape and my road. I read in the FAQ sheet for splines that the landscape will form itself around the spline when you apply the spline to the landscape with the “Apply To Landscape” button. I can’t find the button. Does anyone know where it’s at? I’m in engine version 4.4. Thanks!!
Hi Michael,
You’ll find that you can affect the raising/lowering in Landscape tools Edit Splines mode. You can choose to do this for selected or all splines.Clicking the buttons multiple times will incrementally raise/lower the landscape to the spline.
Feel free to ask any questions if you’re having issues. 
Tim
One thing that I’ve noticed about splines is that if your landscape is sloped you sometimes get a “Gap” between the spline and the landscape. There is a option on the spline control points where you can adjust the rotation of the control points individually which can sometimes help fix this issue. I hope this info helps you out.