Render Pipeline manager.
| currentPipeline | Returns the instance of the current RenderPipeline. | 
| beginCameraRendering | Delegate that you can use to invoke custom code before Unity renders an individual Camera. | 
| beginFrameRendering | Delegate that you can use to invoke custom code at the start of RenderPipeline.Render. | 
| endCameraRendering | Delegate that you can use to invoke custom code after Unity renders an individual Camera. | 
| endFrameRendering | Delegate that you can use to invoke custom code at the end of RenderPipeline.Render. |