Unreal Engine 5 Celestial Day-Night & Dynamic Weather System

Physically grounded astronomical solar/lunar ephemeris, volumetric cloud states, and dynamic rain wetness shaders for Unreal Engine 5.

Production-grade astronomical day-night cycle and dynamic weather architecture for Unreal Engine 5.3, 5.4, and 5.5. Features physically calculated solar and lunar ephemeris trajectories based on geographic coordinates, volumetric cloud layer blending, PBR rain wetness and puddle accumulation shaders, and complete Lumen global illumination tuning.

• True Astronomical Solar & Lunar Ephemeris Coordinate Solver
• Volumetric Cloud Layer Interpolator (Clear, Cumulus, Overcast, Blizzard)
• Dynamic PBR Rain Wetness, Roughness Inversion & Puddle Accumulation
• Lumen Global Illumination & Nanite Tuning (Zero Midnight Light Bleed)
• Smooth Time-of-Day Accelerator & Day/Night Ratio Controls
• C++ World Actor with Full Blueprint API & Event Dispatchers
• Complete .uplugin Manifest with UE5.3/5.4/5.5 Support
• 100% Royalty-Free Commercial License