Cascade Lite – Motion & Transitions for UI Toolkit

FREE core of the Cascade motion library for UI Toolkit: fluent tween engine, the full verb set, sequencing, async/await, reduced-motion. MIT licensed, zero dependencies, Unity 6+.

Runtime tween engine for UI Toolkit (UXML/USS) — Unity 6000.0+, pure C#, zero dependencies, MIT

Full verb set: Fade, MoveX/Y/To, ScaleTo, Rotate, SlideIn, BackgroundColor, TextColor, Width, Height, Size, Top, Left, Value, Nudge

Sequencing: parallel groups, .Then() chains, delays, loops, Pause/Resume/Cancel, OnSettled, async/await

Full easing library + AnimationCurve support; reduced-motion accessibility gate

Lifecycle-safe on panel detach; zero per-frame GC steady state

Sample: Demo - Lite Gallery (every feature live, copyable code) + AI-GUIDE for C# generation

Supported OS: every Unity-supported platform (no native code)

Upgrade path: Cascade Pro adds springs, stagger, variants, transitions, micro-interactions, no-code UIAnimator, JSON/AI authoring

The free core of Cascade — real runtime motion for UI Toolkit (UXML/USS), MIT licensed, zero dependencies.

WHAT LITE INCLUDES

- Fluent tween engine for any VisualElement: el.Animate().Fade(1f, .3f).MoveY(0f, .4f)

- The FULL verb set: Fade, MoveX/Y/To, ScaleTo, Rotate, SlideIn, BackgroundColor, TextColor, Width, Height, Size, Top, Left

- Parallel + sequential chaining (.Then()), delays, loops, Pause/Resume/Cancel

- async/await everywhere — every sequence is awaitable, completion-safe on cancel/detach

- Full easing library + AnimationCurve support

- Reduced-motion accessibility gate

- Lifecycle-safe (panel detach auto-cancels), zero per-frame GC

- Demo sample: every Lite feature live with copyable code per section — plus a preview of what Pro adds

WHAT PRO ADDS ($39.99)

Physics springs with velocity handoff (interrupts keep momentum) • stagger across element lists • variants / named states (To("open")) • ready-made enter/exit & screen transitions with display-safe Show/Hide • hover/press/focus micro-interactions • the no-code UIAnimator (selector rules, preset browser, edit-mode live preview) • AI-first JSON authoring with validated schema and self-correcting errors • mesh drop-shadow/glow • 10 Starter Presets.

Using AI? Lite ships an AI-GUIDE for generating fluent C# with your assistant; Pro adds the validated JSON front door an LLM can't get wrong.

Unity 6000.0+. Clean UPM package. Do not install Lite and Pro together — Pro is a superset.