The Tree editor is a native Unity feature that enables the creation of any kind of tree as long as they have branches and something growing on them (usually leaves).
Before we start working with the Tree editor, make sure that you have the Environment package imported from Assets | Import Package | Environment. We will require some assets from it. We can create our first tree to work with from GameObject | 3D Object | Tree.
After selecting the tree and looking in the Inspector window, you will see a GameObject with a Tree component attached to it. This is where all the tools related to tree creation nest.
The tree ...