In the Properties of any 3D object, you will find all the materials that 3D object uses.
There are two ways to apply a new material to an object:
The easiest way to change the aspect of a Material is to change the color in the Properties. To change the colors of a couch, click on it in the Hierarchy or in the Scene and update the Color Override value of the Cushion section. Some 3D models like this couch have several materials (Cushion and Base Material sections in this example).
Tip: to save colors and reuse them for other materials, you can drag and drop the block showing the New color in the “Drag & drop colors here to save” area.
Most 3D models have the option Smart Material in their Material Properties. This powerful feature allows you to align a texture automatically on different objects. In this screenshot, the walls on the right have the Smart Material property checked. The walls on the left are glitching because the game has no idea which wall must be rendered.
Sometimes, the Smart Material won’t render the object as you want. You can disable this option and use the U Tiling Override and V Tiling Override to change the amount of repetition of the texture on the object. Increasing the U Tiling Override to 2 means that the texture will be repeated twice horizontally.