Describes a VisualElement background.
| texture | The texture to display as a background. You cannot set this and Background.vectorImage at the same time. |
| vectorImage | The VectorImage to display as a background. You cannot set this and Background.texture at the same time. |
| FromTexture2D | Creates a background from a Texture2D. |
| FromVectorImage | Creates a background from a VectorImage. |