The Procdedural Foliage is still an experimental feature, so in order to enable it within the engine you need to locate the experimental section within the Editor Preferences.
Editor Preferences - Experimental
Then use the ‘Add New’ button in the Content Browser and locate the ‘Procedural Foliage Spawner’ under the miscellaneous section. Drag this into your scene to use the volume itself.
The Procdedural Foliage is still an experimental feature, so in order to enable it within the engine you need to locate the experimental section within the Editor Preferences.
Editor Preferences - Experimental
Then use the ‘Add New’ button in the Content Browser and locate the ‘Procedural Foliage Spawner’ under the miscellaneous section. Drag this into your scene to use the volume itself.