DXHitTestOptionsBackgroundRenderingQueue Property

When BackgroundRenderingQueue is specified, then the objects that are assigned to that rendering queue will be considered farther from the camera than objects from other rendering queues. This means that GetClosestHitObject(Ray, SceneNode) will return objects from any other rendering queue if they exist before returning objects from the specified rendering queue.

public RenderingQueue BackgroundRenderingQueue { get; set; }