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WWDC25 · 28 min · Graphics & Games

Bring your SceneKit project to RealityKit

Understand SceneKit deprecation and explore how to transition your 3D projects to RealityKit, Apple’s recommended high-level 3D engine. We’ll clarify what SceneKit deprecation means for your projects, compare key concepts between the two engines, and show you how to port a sample SceneKit game to RealityKit. We’ll also explore the potential of RealityKit across all supported platforms to help you create amazing 3D experiences with your apps and games.

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Code shown on screen · 3 snippets

Animations in RealityKit swift · at 16:33 ↗ 
// RealityKit
guard let max = scene.findEntity(named: "Max") else { return }

guard let library = max.components[AnimationLibraryComponent.self],
      let spinAnimation = library.animations["spin"]
else { return }

max.playAnimation(spinAnimation)
Directional Light Component in RealityKit swift · at 18:18 ↗ 
// RealityKit

let lightEntity = Entity(components:
    DirectionalLightComponent(),
    DirectionalLightComponent.Shadow()
)
Create Bloom effect using RealityKit Post processing API swift · at 24:37 ↗ 
final class BloomPostProcess: PostProcessEffect {

    let bloomThreshold: Float = 0.5
    let bloomBlurRadius: Float = 15.0

    func postProcess(context: borrowing PostProcessEffectContext<any MTLCommandBuffer>) {

        // Create metal texture of the same format as 'context.sourceColorTexture'.
        var bloomTexture = ...

        // Write brightest parts of 'context.sourceColorTexture' to 'bloomTexture'
        // using 'MPSImageThresholdToZero'.

        // Blur 'bloomTexture' in-place using 'MPSImageGaussianBlur'.

        // Combine original 'context.sourceColorTexture' and 'bloomTexture'
        // using 'MPSImageAdd', and write to 'context.targetColorTexture'.
    }
}

// RealityKit

content.renderingEffects.customPostProcessing = .effect(
    BloomPostProcess()
)

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