Demonstrating full immersive preview

ImmersivePreviewExample.swift

import RealityKit
import SwiftUI

struct ImmersivePreviewExample: View {
    var body: some View {
        RealityView { content in
            let meshResource = MeshResource.generatePlane(width: 2.0, height: 2.0)
            let entity = Entity()
            let modelComponent = ModelComponent(mesh: meshResource, materials: [SimpleMaterial(color: .yellow, roughness: 1.0, isMetallic: false)])
            entity.components.set(modelComponent)
            entity.transform.translation.y = 2.0
            entity.transform.translation.z = -5.0
            content.add(entity)
        }
    }
}

#Preview(immersionStyle: .full) {
    ImmersivePreviewExample()
}