1. A see-through, augmented reality display device system for providing realistic occlusion comprising: a see-through, augmented reality display having a user field of view and being supported by a support structure of the see-through, augmented reality display device; at least one camera supported by the support structure for capturing image data and depth data for real objects in the user field of view of the see-through, augmented reality display; one or more processors communicatively coupled to the at least one camera for receiving image and depth data including the user field of view and to track depth positional data from the user field of view; the one or more processors for determining a spatial occlusion relationship between an occluding object and an occluded object, and determining a first level of detail criteria based on the positional data used in processing a level of occlusion for the occluding object, the occluding object and the occluded object including a real object and a virtual object, respectively, based on the image and depth data; and the one or more processors being communicatively coupled to the see-through, augmented reality display and the one or more processors causing the see-through display to represent the spatial occlusion relationship in the display by modifying display of the virtual object and causing the see-through display to provide varied levels of occlusion as determined by the first level of detail criteria when rendering the occluding object.