Procedural Skybox - Blueprint Control

Place SkyBox Time of Day Actor in the level.
In your Level Blueprint, Game Mode, or manager Blueprint, create a variable that references the placed sky actor.
Use the Blueprint functions below to change time, query sun/moon direction, or force visual updates.
If you drive time yourself, call Set Time Of Day instead of directly setting the variable.

Function	Use It For
Set Time Of Day	Set the current time directly. Useful for clocks, sleep systems, menu sliders, or scripted scenes.
Get Sun Direction	Read the sun direction vector for gameplay, material effects, AI, or VFX.
Get Sun Elevation	Read how high the sun is above or below the horizon.
Get Sun Azimuth	Read the horizontal direction of the sun around the level.
Get Moon Direction	Read the moon direction vector.
Get Moon Elevation	Read how high the moon is above or below the horizon.
Is Moon Visible	Check whether the moon should currently be visible in the sky.
Update Sky	Force all sky, lighting, fog, post process, and material values to refresh.
Recapture Sky Light	Manually refresh the sky light capture.
Apply Planet Preset	Switch to a planet preset from Blueprint.
Get Active Planet Config	Read the currently active planet settings.
Set Aggressive Optimization	Turn reduced material updating on or off at runtime.
Set Update Frequency	Change how often visual updates are applied.

Create a Widget Blueprint with a slider.
Set the slider range to match your day length. For the default setup, use 0 to 24.
On slider value changed, call Set Time Of Day on your sky actor reference.
After big changes, call Update Sky if you need an immediate refresh.