Lumion is the key of the fast exterior/interior rendering. You don't need anything as an object in your scene. You only need walls, Lumion has a great archive about peoples, furniture, vehicles, decorative objects, etc.
Am I need a archive for take a render ?
You don't need to material archive for renders because Lumion had a great deal with Poliigon and other texture creators. Also, It have own texture archive inside. In the Pro version, you can reach thousands of materials and object.
What will I learn in this tutorial ?
In this tutorial, we showed you how to create terrain, and how to change textures of models and how to prepare a scene for renderings.