I have a simple scene with a terrain mesh and some trees on it. For some reason, the terrain mesh is either appearing completely behind the trees or completely in front of them, depending on the view angle.
Here it is behind the trees (the roots should be hidden under the ground):
Here it is in front of the trees:
It pops between these two states when I pan the camera above and below a certain height.
Does anyone know why this could be happening?