The appearance of the ball and the other meshes in your scene have been intentionally left very plain. You can think of the flat, white ball like a blank canvas, ready to be molded and shaped the way you want it. Applying graphics to 3D models can be a very complex process, especially if you're not familiar with it. First, a bit of vocabulary:
- Textures: Textures are flat, 2D images that are wrapped around 3D objects to give them more interesting appearances. Imagine wrapping a present: the flat paper is folded around the package, conforming to its shape. Textures can be very simple or quite complex depending on the shape they are designed to be applied to. An example of a simple one would be a small pattern of bricks that can be repeated on a large wall object.
- Shaders: While textures determine what is drawn on an object's surface, shaders determine...