Those are Lumion materials. When you apply materials in Lumion you have the option to save them to your custom material library and then you can use the same materials across multiple Lumion files. The materials I used in this tutorial all originated from the Lumion material library.
Hi benjamin, im fan of your videos because you draw a lot in sketchup and i do the same. I have a suggestion, i think you should use two point of perspective to align your horizontal lines, so it will be much better! it´s such a tip, Great video! i will wait for more 😁