The Metal render command encoder in use for the current SceneKit rendering pass.
- iOS 9.0+
- macOS 10.11+
- tvOS 9.0+
Use this render command encoder to encode additional rendering commands before or after SceneKit draws its own content.
This property is valid only during the SceneKit rendering loop—that is, within one of the methods defined in the
SCNScene protocol. Accessing this property at any other time returns