With Prompto you can add your own materials. These materials can then be used within your scenes and are saved across all the users in your company. You have the freedom to create and name these materials as you please.
Materials have to be a square and for the best results, they should be repeatable.
To see how you can add your own materials, check the following tutorial:
An example of a material that can be used inside Prompto can be downloaded at the bottom of this article.