HitTestOptionsBackgroundRenderingLayer Property

When BackgroundRenderingLayer is specified, then the objects that are assigned to that rendering layer will be considered farther from the camera than objects from other rendering layers. This means that the GetClosestHitObject method will return objects from any other rendering queue if they exist before returning objects from the specified rendering layer. When calling GetAllHitObjects, then this property does not have effect.

public RenderingLayer? BackgroundRenderingLayer { get; set; }