New Unity User! Need help with terrain editor (3D).

Unity Engine
1

I’m using Unity 5.4.1f (64 bit). I just installed and started using Unity last week so I am slowly trying to learn the different things you can do. So far I’ve learned how to import assets, put down a character in a map, and make my own (very basic) heightmap and create a terrain with it in Unity.

The problem I have is once I create my terrain, the terrain editor doesn’t want to work. I try using Terrain Smoothing, Paint Detail (for grass), and Place Trees but none of it works. Maybe it’s just that I don’t know how to use the tools (hold left click with the mouse and just move it around the terrain to smooth/place grass/etc. right?) or is it something else that I am missing?

2

There are some ‘older’ resources on how to use terrain on the youtube channel, I think here in the learn section and on the general youtube search.
Great thing about it - the terrain system hasn’t been updated so all that old material is relevant. Kinda not great thing about it - is the terrain system has not been updated so all that old material is still relevant.