When you build the deep Canyons with water on the ground, the position for the green box is bound to the position the mouse is at. This way the mouse and so the green box can "jump" especially from a lower camera angle.
To make it clear:
What happens all the time:

What I actually need (only possible from a higher camera angle):

To prevent this here my idea:
It would be better if the position of the green box would be bound to the height of the ground. To be more specific: The green box should be bound to the height where you start dragging the green box.
This should apply to all terraforming blocks, as this also happens with the high mountains just not that extremely due to a smaller height!

Just ask if you need further explanations
