Much of the information about shaders is covered later this hour, because you cannot create a shader without a material. This might seem nonsensical right now, but later when we create materials you will begin to understand how they work. Here’s another way to look at this: A material contains properties and textures, and shaders dictate what properties and textures a material can have. If the texture of a model determines what is drawn on its surface, the shader is what determines how it is drawn. If you want to avoid this issue, use textures specifically designed for (unwrapped for) the model that you are using. The model has no idea which way is correct, so it applies the texture however it can. This problem occurs when you take a basic rectangular 2D texture and apply it to a model. Just know that this is not a mistake or an error. You might notice that the textures warp a bit or get flipped in the wrong direction. Later in this hour, you will apply some textures to models.