Camera.transparencySortMode
var transparencySortMode: TransparencySortMode;
TransparencySortMode transparencySortMode;
transparencySortMode as TransparencySortMode
Description

Transparent object sorting mode.

By default, perspective cameras sort objects based on distance from camera position to the object center; and orthographic cameras sort based on distance along the view direction.

If you're making a 2D game with a perspective camera, you might want to use TransparencySortMode.Orthographic sort mode so that objects are sorted based on distance along the camera's view.