Time And Planet Setup

Setting	What It Controls	Typical Use
Enable Generic Celestial System	Uses a planet profile instead of the normal Earth-style time controls.	Turn this on for alien worlds, stylized planets, or unusual day lengths.
Planet Preset	Quick presets: Custom, Earth, Mars, Venus, Mercury, Jupiter, Proxima Centauri b, Kepler-442b.	Pick a base sky behavior, then tune the planet settings if needed.
Planet Config	Axial tilt, rotation period, orbit period, orbit distance, orbit eccentricity, atmosphere density, scattering colors, and primary star values.	Create custom planets and star systems from Blueprint-editable values.
Enable Time Of Day Cycle	Allows the actor to tick and advance time during play.	Use for dynamic day and night cycles.
Time Of Day	The current time. The editor slider adapts to the active planet day length.	Preview or set a specific time from the Details panel or Blueprint.
Time Speed	How quickly time advances during play.	Use a high value for visible day and night transitions.
North Offset	Rotates the sun path around the scene.	Align sunrise and sunset with your level composition.
Latitude / Day Of Year	Seasonal sun angle for the normal Earth-style setup.	Change the height of the sun path and seasonal feel.

Sky Sphere Settings

Setting	What It Controls
Enable Sky Sphere	Shows or hides the procedural sky sphere mesh.
Sky Sphere Material	The sky material or material instance applied to the sphere.
Sky Sphere Radius	How large the sky sphere is around the actor.
Sky Sphere Segments	Sphere mesh resolution.
Sky Sphere Cast Shadows	Whether the sky sphere casts shadows.
Affect Distance Field Lighting	Whether the sky sphere participates in distance field lighting.
Cloud Opacity Min / Max	Clamps the cloud opacity that the time-of-day system sends to the material.
Star Brightness Min / Max	Controls how stars fade between day and night.
Cloud Opacity	Controls day/night cloud visibility. Horizon, zenith, and cloud colors are adjusted on the assigned material instance.
Panning Cloud Quality / Global Tiling	Controls procedural cloud noise octaves, Worley detail, edge softness, and overall cloud tiling to reduce blocky cloud artifacts.

Sun, Moon, Atmosphere, Fog, And Exposure

Group	Important Settings	Use
Sun	Sun Intensity, Sun Min Intensity, Sun Disk Scale, noon/sunrise/night colors, temperature influence, atmospheric shadows, shadow cascades, dynamic shadow distance.	Control the main directional light and how it colors the sky.
Moon	Enable Moon, Enable Moon Light, Enable Moon Phase, Moon Parameters, material, orbit values, Max Visual Elevation, rendered scale, and mesh segments.	Add the primary moon. Moon Parameters control placement, scale, orbit, light, max visible arc height, surface brightness, highland/mare/crater colors, terrain noise, regolith, crater layout, normals, and displacement. Runtime moon phase is derived from Time Of Day only when Enable Moon Phase is on.
Planet Config Additional Moons	Optional array for extra moons only. The primary moon is always Moon Parameters on the sky actor and is not duplicated in this array.	Add secondary moons for custom planets or presets without changing the main moon index.
Atmosphere	Rayleigh scale/color/distribution, Mie scale/color/absorption/anisotropy/distribution, atmosphere height, aerial perspective distance, ozone absorption, ground albedo, multi-scattering.	Shape blue sky, haze, sunset bands, dense atmospheres, and alien looks.
Sky Light	Enable Sky Light, intensity, cubemap resolution, real-time capture, lower hemisphere color.	Control ambient lighting contribution from the sky.
Height Fog	Fog density, height falloff, inscattering color, max opacity, start distance, directional inscattering, volumetric fog settings.	Add horizon depth, sunrise fog, moonlit fog, and volumetric atmosphere.
Post Process	Exposure override, exposure method, bias, min/max brightness, unbound mode, priority, blend weight, lens flare, bloom.	Keep day/night exposure readable and add optional sun glow.
Performance	Visual Update Frequency, Aggressive Optimization, Min Time Change Threshold, Sky Light Recapture Interval.	Reduce update cost in runtime scenes.