Tree's, grass and other details.

So now your island has some basic textures I'm sure you want to add some more to it to give it a bit more life and make it more interesting. This is a quick and easy way to add lots of detail. Again it use's brushes but we are going to get the brush to paint 3d models onto our terrain.

First Click on the Terrain option in the Roll-bar and hit "Vegetation".

After that you need to make a "category" this is basically going to be the collection of models in the brush. so lets call this category "tree's".

Now your "category" has been made we are going to decide what models we want in our brush. click on your category and select "Add Object" 

a folder window will appear containing 3d objects, navigate the folders till you find "Objects,Natural,Trees" and select a model for your scene. Repeat adding models to your category till you have all the tree's you want.

Now you have added a few objects its time to make some choice's about the models, you do this in the options in the bottom right window. Things such as size, size variation,random rotation, align to terrain (defiantly tick this box). Then with the "tree's" category selected type a number into the "Brush radius" and hit "Paint objects". then start painting you Forrest onto your map.

 you can add more categories with more objects like grass, rocks or any other objects you can find.