Reality Composer Pro 3 is a standalone tool (no longer bundled inside Xcode) that introduces live on-device preview, GPU-based Compute Graphs, a Lightmapping system for baked indirect lighting, a prototype/instancing workflow, and an AI Assistant that generates 3D objects and materials on demand for visionOS experiences.
• Live Preview streams scene changes directly to a connected Vision Pro in real time, eliminating build-and-deploy cycles and letting you see lighting and physics exactly as end-users will
• Lightmaps let you pre-bake indirect lighting (including ambient occlusion and beauty passes) into textures, giving scenes high-quality global illumination at runtime without GPU cost
• The AI-powered Reality Composer Pro Assistant generates 3D objects and materials from text prompts, letting you prototype and populate scenes in seconds without leaving the tool
Liquid Glass is Apple's new material and visual design language introduced in iOS 27, bringing translucent, refractive glass-like surfaces to system and custom UI elements. It replaces the frosted vibrancy aesthetic with a more dynamic, depth-aware material that responds to content beneath it.
iOS 27 brings a sweeping set of SwiftUI enhancements including Liquid Glass design adoption, new toolbar visibility and overflow APIs, document architecture improvements with Observable, and resizable iPhone app support — all designed to modernize app UIs with minimal code changes.
Xcode 27 introduces a fully customizable toolbar and theme system, untitled scratch projects, coding agent integration directly in the editor, and the new Device Hub for evaluating apps across simulators and physical devices side-by-side.
In-depth guide
RealityKit & USDKit in iOS 27 →PaperKit is Apple's full-featured canvas framework — previously internal-only — now publicly available in iOS/macOS/visionOS 27. It powers the drawing and markup experience in Notes, Preview, and Freeform, giving developers access to a complete pencil, shapes, images, and text canvas with a rich data model.