Ultra Dynamic Sky is a sky system designed to be more dynamic and natural than most sky solutions, offer a great degree of flexibility and customization options, with an interface designed for speed and simplicity.

Features
• Set a single Time of Day variable and have every aspect of the sky update along with it, making changing the time your scene takes place a one step process.

• Fully dynamic, with customizable clouds, moon and stars.

• A built in lighting solution with sun, moon and sky lighting all synced with the sky.

• Adjust cloud coverage from a clear sky to overcast.

• Animate a day/night cycle with a single click.

• Dynamic aurora effects

• Multiplayer ready

• Choose from volumetric 3D clouds, 2D dynamic clouds, static clouds, and even volumetric auroras.

• A full weather system is included, Ultra Dynamic Weather, which adds rain, snow, lightning, and more to your scene in seconds.

• Enable Simulation features, which calculate the real world position of the Sun, Moon and Stars, using latitude, longitude, date and time.

11-11-2025
Version 9.2
For UE 5.5, 5.6 and 5.7
Added options to UDS and UDW for “Sky Configuration Override” and “Weather Configuration Override”. You can select a configuration asset (authored with the Configuration Manager) for UDS or UDW to directly reference for its configuration. This way for example you can have UDS instances in different levels that reference a shared configuration asset which you can edit in one place.
UDS cloud shadows can now render into the light function atlas in a usable way. Note of course that with volumetric clouds, shadows in the atlas will extend above the cloud layer, as the atlas is just a 2D representation of the real light function. For the same reason, note there is no support for the water caustics in the atlas.
Reworked how Daylight Savings Time start and end days are configured. They’re controlled by days of the week counted into the month, for example the second Sunday of the month, or the last Friday of the month. This allows DST start and end to properly vary from year to year. Also added support for the end hour being different from the start hour.
Location Presets on UDS in the Simulation category now also control daylight savings time settings, toggling DST and setting the start and end timing to be correct for the location
Added a utility, Configuration Buttons, which can be used to pin buttons for sky and weather configurations to a compact panel, for quick access in the level editor.
Added a setting to control the volumetric fog extinction of the global volumetric material, in spaces masked by the weather mask
Added an Automatic option for Control Point Location Source on UDW, which determines the source using Project Mode on UDS (pawn location for games/realtime, camera location for offline/cinematic). This Automatic option is the new default.
Added a function to UDS to output the current month as a string
Simplified controls for Screen Space Light Shafts on UDS. Scale, Max Brightness, and Bloom Threshold are now exposed as single values, to avoid a renderer issue in recent engine versions with changing light shaft settings on directional lights at runtime.
Added an option to UDS, Correct Specular Scale For Low Angle Cloud Shadows, which can reduce specular scale when the light is very low in the sky among partial cloud coverage, to help work around situations where the directional specular can appear mismatched with the clouds.
Added an option to UDW to choose between multiple methods for lightning flash bloom/glow. You can choose between light shaft bloom, a post process material glow, or disable the effect. The post process material effect is the new default.
Added a function to UDS, Offset Time of Day by Hours, which can offset time forward or backward by a number of hours, adjusting the date as needed.
Added a function to UDS, Offset Time by Time Span, which can offset the time and date values using a Time Span struct
Added an option to UDS, a string array called Disable Cvar Control, which can be used to disable UDS/UDW’s control of specific cvars if needed
Improved behavior of the “Clouds Move with Time of Day” option, to be more responsive to fast changes of time and be previewed in the editor.
Improved the look of the inside cloud fog post process effect, with colors more consistent with cloud lighting and directional inscattering
Adjusted UDW random weather logic so if all potential presets are ruled out by the limiters (repeating type, extreme cloud coverage change, etc) it will fall back to the unfiltered map.
etc