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A GUI object is a flat or mesh-based graphical element, which can have various widgets assigned to it. For GUI objects the gui_base material is used.GUI对象是基于平面或基于网格的图形元素，可以具有各种小部件分配给它。对于GUI对象，将使用gui_base材料。
There are two types of GUI objects:GUI对象有两种类型：
- GUI is a flat GUI object. GUI是平面GUI对象。
- GUI Mesh is a non-flat GUI object based on an arbitrary mesh. GUI Mesh是基于任意网格的非平坦GUI对象。