Can WM fly over minerals from behind?
Yes widow mines can fly
Verticality and walls do not block the collision of most projectiles.
Only things like disruptor shots are obstructed.
So for example, you can drop mines behind the mineral line and they can still shoot the SCV’s on the other side.
A highground widow mine can still hit the low ground, and a low ground widow mine can hit the high ground, as long as it has vision.
You can place widow mines on the other side of the gold minerals in Blackburn, and they still hit.