| Interface | Description | 
|---|---|
| GeometryComparator | GeometryComparatoris a special version ofComparatorthat is used to sort geometries for rendering in theRenderQueue. | 
| Class | Description | 
|---|---|
| GeometryList | This class is a special purpose list of  Geometryobjects for render
 queuing. | 
| GuiComparator | GuiComparatorsorts geometries back-to-front based
 on their Z position. | 
| NullComparator | NullComparatordoes not sort geometries. | 
| OpaqueComparator | |
| RenderQueue | RenderQueueis used to queue up and sortgeometriesfor rendering. | 
| TransparentComparator | 
| Enum | Description | 
|---|---|
| RenderQueue.Bucket | The render queue  Bucketspecifies the bucket
 to which the spatial will be placed when rendered. | 
| RenderQueue.ShadowMode | ShadowModeis a marker used to specify how shadow
 effects should treat the spatial. |