Mtree is a powerful vegetation solution for vegetation in Unity.

Mtree is a powerful vegetation solution for vegetation in Unity. This tree editor lets users create AAA-quality vegetation, streamline the workflow and lessen the iteration time. You don’t need to worry anymore about modeling, unwrapping, importing meshes from a different software solution, shaders, vertex data and more.

With the tool you can:

• Create a trunk of any shape.
• Add branches, grow them, split stem, add more branches.
• Add leaves of any shape.
• Bake the ambient occlusion in the vertex data.
• Control the polygon count, get the most out of the fewest triangles.
• Create Branches textures from a single leaf texture with the Branch Editor.
• Save your finished tree as a prefab that is convenient to use.

The tool will:

• Automatically create LOD levels
• Create and assign materials to the bark and leaves of your trees
• Make branches react to the colliders of your scene
• Bake the ambient occlusion when you save the tree as prefab
• Create vertex color data that will be used to drive the wind simulation and random color variation

You can learn more here.