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Is it possible to set a CALayer as the contents of a RealityKit material?

Is it possible to set a CALayer as the contents of a RealityKit material? Currently this is possible with SceneKit materials. I am wondering if there is something similar for RealityKit. https://developer.apple.com/documentation/scenekit/scnmaterialproperty/1395372-contents
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Radeon 6800 ray tracing support in Metal.

Does Metal support utilizing the ray tracing acceleration hardware available in the Radeon 6000 series GPUs? Can the 6000 series run the WWDC20 session 10012: Discover Ray Tracing with Metal demo? Do any AMD GPUs support it or only the Intel integrated ones? The WWDC session video shows a sample forest scene running on a Mac Pro with the W5000 series AMD GPU. Please see: https://developer.apple.com/forums/thread/651077
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RealityKit equivalent to GKComponentSystem?

Does RealityKit have a component system? Something equivalent to GameplayKit’s GKComponentSystem (https://developer.apple.com/documentation/gameplaykit/gkcomponentsystem)? I would like to be able to manage periodic updates for certain custom RealityKit components without having to manually traverse the entity hierarchy trying to find all entities with that component.
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