(SOLVED) How do you fix elevation map assignment of an imported terrain on its side?

IceEmpress

I'm a noob, and I can't figure out how to do it.

See, let's say that you import a terrain, but it's flipped sideways. So you rotate it into its correct position, but the heightmap based materials still treat it as if it was on its side.

How do you fix this? And please give the solution step-by-step, since I'm a noob.

Edit: I see there's a way to rotate the texture itself. Do I rotate it by the same degrees that I rotated the terrain?

Edit: Nevermind, played around some more and figured it out.