This is interesting enough, but it would be quite boring to be in an all-white world. Thankfully, it's very easy to add textures to everything. But first, we need to have some textures to paint onto the world and, for this instance, we will make use of some of the free assets that Unity provides us with. To make use of these assets perform the following steps:
To download it, we'll use the Asset Store again. So, with this in mind, select Window | Asset Store.
In the top-right corner of the screen, you'll see a search bar where you can type in
Terrain assetsand press Enter. Once there, the first asset you'll see is Terrain Assets that is released by Unity Technologies for free. Click on it and then once in the menu, click on the Download button.
Once it finishes downloading, you should see the Importing package dialogue box popup (if it doesn't pop up, click on the Import button, where the Download button used to be).
Generally, you'll want to select only...