Reality Composer Pro 3 introduces Animation Graph, Behavior Trees, Script Graph, Navigation Mesh, and Compute Graph — a suite of visual, node-based editors that let you author character animation, autonomous AI routines, interactivity, pathfinding, and particle effects entirely within the editor without writing code.
• Animation Graph enables runtime blend spaces, motion warping, and IK-driven character animation controlled by boolean/float parameters you set from Swift at runtime
• Behavior Trees let you define multi-step autonomous routines (patrol, react, interact) visually and test them live in the editor without a build cycle
• Script Graph adds event-driven no-code interactivity (tap gestures, parameter setters, subgraphs) so your whole team can prototype spatial experiences quickly
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 introduces new SwiftUI drag and drop APIs including reorderable, reorderContainer, dragContainer, and configuration modifiers that enable reordering within and across collections, multi-item drag, and fine-grained control over how data is transferred during drag and drop operations.
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.
In-depth guide
RealityKit & USDKit in iOS 27 →iOS 27 enforces stricter adaptivity requirements for UIKit apps, making iPhone apps fully resizable in iPhone Mirroring and on iPad, while introducing new navigation bar minimization controls, sidebar opt-in for iPhone tab bars, and prominent tab customization.