In this video, you will learn how to apply a material to objects in Twinmotion. While this sounds simple and is simple, this is based on how the model was imported into Twinmotion. This video covers how it is important to know which method was used to import and how to deal with each type of imported property when it comes to applying materials. Apply materials to objects versus replacing the materials on the object is the key to applying materials correctly.
https://dev.epicgames.com/community/learning/tutorials/2GG1/apply-material-to-objects-twinmotion-2020