SceneKit watchOS 6.0 Beta 1 to Beta 2 API Differences

SCNMaterial.h
Added SCNLightingModelShadowOnly
SCNParticleSystem.h
Modified SCNParticlePropertyController.inputOrigin
Declaration
From@property (nonatomic, unsafe_unretained) SCNNode *inputOrigin
To@property (nonatomic, weak) SCNNode *inputOrigin

SCNSceneRenderer.h
Modified SCNSceneRenderer.delegate
Declaration
From@property (nonatomic, unsafe_unretained) id<SCNSceneRendererDelegate> delegate
To@property (nonatomic, weak) id<SCNSceneRendererDelegate> delegate