As already mentioned, we have at least three options to have materials in Lumion. The first option is the one we just saw: using Lumion's materials. In most cases, the materials available will be enough for your project, but there are always special requests from the client to use a particular material and that leads us to the second and third options.
The second option is to use the imported materials that you create in your favorite modeling application. This makes a lot of sense, because if you are modeling, it's always a good idea to do the following: