Negative poi height

[ifana]

Anyone know how to use negative poi heights? Trying to create a plan of a lighthouse that is 50m below my take off point.

 

[Jagerbomb52]

Nope but interesting question. Will be following this one.

 

[Zamzara]

Yes I've just discovered this problem too. Got some nice footage of the spot 30 metres over my POI building.