To fully render the sides and overhung areas you need to be using the "Full 3D" setting. You can read more about it here:
https://support.dronesmadeeasy.com/hc/en-us/articles/207855366-Full-3D-vs-2-5D-Processing
Also, your overlap is looking a little thin if you are caring about the roof tops. You may need to use the Ground Offset feature to raise the plane for which the overlap is calculated up to the tops of what you are covering.

