Hi Jason,
I can’t answer from an installation perspective, but Dave is correct and LINKPlanner treats all obstructions the same and tries to shoot over the obstructions using the knife-edge diffraction model (when clutter is disabled) or the Delta-Bullington diffraction model (when clutter is enabled).
The tilt angle is calculated based on the high points along the profile. The red line in the profile indicates the sight line that is used to calculate the tilt, when the direct line of sight is obstructed.
Thanks,
Andy