Let’s return to the Library. Select Aspen 1 and drag it onto the new Area. A new dialog will appear. Here you can select what kind of scattering you want to use. We will select Scattered Vegetation. This will place trees uniformly at random locations within the area.

Select the Size & Density property. Height Range is the first one and it is probably the most important. In many cases it is enough to adjust just this one attribute. First, we need to make an approximation of the height range. Use the examples provided for an idea of how big to make the trees.

We’ll also make the trees render faster by redefining them as Flipboards. Flipboards are single-polygon objects that contain both color and alpha images to simulate more complex shapes. In the Objects List property, enable "Draw as flipboards". Because this group of trees will be more distant, it will be okay to render them this way. This conversion happens on the fly each time you render the scene.