Hi all. I'm new to Unity and therefore just learning how to use Unity, but I have come across a problem. I cannot lower or 'invert' the terrain past its surface. I have increased the terrains 'height' from 0 to 1000, which should allow me to 'dig below the surface' right? Also, how do I change the terrains material? I want to change it from the default gray to a grass texture. I have tried going into terrain settings and clicking material but there is no grass asset. Thanks in advance, Vixone.