Then select all of the cube surfaces and create a group so that everything can be rotated easily.
然后选中长方体的全部平面，并将他们成组，这样它可以作为一个整体，方便旋转。
In the Top viewport, select the handle and the button. Mirror the surfaces, using Object Snap 'Mid.
在俯视图中，选择手柄及按钮，选择目标捕捉中点，对面进行镜像。
Select scene geometry that should affect the navigation -walkable surfaces and obstacles.
选中游戏场景中需要进行导航设置的几何物体- - - - - - -可行平面区域和障碍物。
Select only the surfaces facing the window that would be hit by the light coming through the glass.
只选择出面向窗户的，可能被从玻璃中穿透的光线所打亮的面。
Select only the surfaces facing the window that would be hit by the light coming through the glass.
只选择出面向窗户的，可能被从玻璃中穿透的光线所打亮的面。
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