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.

Note for 4.8 to 4.25:

Please refer to the image above labelled Features by Version for the major points of what is included in older versions. For a look at the older versions, see the old product videos here: 4.24 to 4.25 and 4.8 to 4.23

11-20-2024
Version 8.5
For UE 5.1, 5.2, 5.3, 5.4, and 5.5
Added a new Sky Modifier Editor utility, a tool for creating and working with sky modifier assets
A sky modifier can now be selected on a weather preset asset directly, and it will be applied to UDS based on how that preset is affecting local weather. Associating custom presets with sky modifiers allows weather to effectively take control of anything on UDS exposed to the sky modifier system.
Added an Ultra Dynamic Sky level editor toolbar menu, with shortcuts to UDS tools and utilities.
Added an option to scale Simulation Speed at night
Added an actor component, UDS Client Controller, which can be added to a Player Controller to provide replicated events for the client to send time/weather changes to the server. The Onscreen Controls widget will automatically make use of this from a client, if the component exists on the player controller.
Added a color variable to tint sun disk color
Expanded the properties which can be controlled by the Sky Modifier system
Added a new Nebula effect to the Space Layer category on UDS, for rendering a layer of noise based nebula into the space layer
Exposed weather particles’ visibility to raytracing to a setting in Shared Particle Settings, off by default. Bypassed if Adjust for Path Tracer is enabled on UDS.
Changed the Space mode to allow Night Sky Glow to affect sky color in that version of the material.
Fixed rain splash particles spawning against surfaces at incorrect normals relative to general rain velocity
Fixed wind direction variation going out of sync on multiplayer clients
Fixed for a renderer bug which could cause the Space mode to render with a black horizon in some project templates
Fixed issue with “Clouds Move with Time of Day” causing sudden cloud movement at midnight
Fixed for an editor crash when opening the puddle ripple niagara system in 5.4 with RT features enabled in DX12.
Fixed weather particle spawning issue when the player camera is pointed exactly straight down
Removed some circular class dependencies between UDW and its components, to help avoid a new engine crash specific to some packaging settings in 5.5
Fixed for a material compilation error when cooking for android in some contexts
Made UDW apply a cvar by default in 5.5 to avoid GPU niagara emitters taking a long time to cache and start working on first launch of a packaged build. Toggled as part of Apply Version Specific Correction.
Fixed Onscreen Controls manual weather sliders sometimes not responding to clicks
Fixed obscured lightning not being disabled consistently by its toggle