I posted this on Landscape spline issues - General / Feedback & Requests - Epic Developer Community Forums (unrealengine.com).
In short:
- After selecting one segment, “all segments” or “all control points”, I cannot access control points to move them in any direction. The only way to access them again is to close and reopen the project.
- Moving a control point does relevel the landscape but not over the full width of the spline, and in some parts, not even to the spline itself , leaving a gap between the spline and the landscape. This is most clear when a static mesh is applied to the spline.
When a control point is then lowered to the landscape with the END key, som points do make it to the landscape without lowering the landscape, where others lower the landscape as well - even if in Terrain deformation “lower” is unchecked.