Powerful day-night cycle system with editor visualization and real-time controls, supporting multiple Suns and Moons, lunar phases, seasons, events, and Timeline.DayCycle is a flexible day-night cycle system for Unity that simulates the movement of celestial bodies across the sky. It supports multiple Suns, Moons, and custom celestial objects, enabling a wide range of sky setups from realistic worlds to stylized or alien environments.The system is based on simplified astronomical calculations, providing believable solar movement, seasonal shifts, and lunar phases while remaining lightweight and easy to integrate into existing projects.DayCycle can be fully configured directly in the Unity Editor without entering Play Mode. Built-in visualization tools display orbital paths, daily parallels, the ecliptic, and latitude/longitude grids, making it easy to design and debug sky movement.The package includes an event system that can trigger signals for sunrise, sunset, day start, night start, and other time-based gameplay mechanics. Timeline integration allows precise control of celestial motion in cutscenes and scripted sequences.DayCycle is suitable for many types of projects including open-world games, survival games, simulators, strategy games, and stylized worlds with multiple stars or moons.All parameters such as latitude, day of year, time of day, orbital tilt, and celestial bodies can be customized, allowing developers to create both realistic Earth-like skies and completely fictional planetary systems.Key featuresFlexible day-night cycle system with support for multiple Suns, Moons, and custom celestial bodiesSimplified astronomical model with seasonal solar shift and lunar phase simulationEditor-driven workflow – configure and preview celestial motion directly in the Unity Editor without entering Play ModeBuilt-in visual debugging tools: orbital paths, daily parallels, ecliptic line, and latitude/longitude gridGlobal planet settings via ScriptableObjects (latitude, day of year, orbital tilt, time scale)ScriptableObject configurations for celestial bodies, allowing reusable Sun, Moon, and custom object setupsCentralized GameTime system representing in-game time and calendar dateModular celestial body controllers responsible for updating object orientation and movement in the sceneRendering pipeline adapters for integration with different Unity render pipelinesExtensible architecture allowing developers to implement custom celestial body logic or rendering adaptersTime-based gameplay events such as sunrise, sunset, day start, and night startTimeline integration for cinematic control of time and celestial motionCompatibilityUnity Built-in Render PipelineUniversal Render Pipeline (URP)High Definition Render Pipeline (HDRP)PerformanceLightweight system designed for runtime efficiencyUses simplified orbital calculations suitable for real-time gamesMinimal runtime overhead – most configuration and visualization tools are Editor-onlyAI Usage DisclosureAI tools were used as a development assistant during the creation of this package. They helped with code suggestions, utility script drafts, architecture discussions, and documentation wording.All AI-assisted content was reviewed, edited, and validated by the author before inclusion in the final package.
