Day / Night Cycle

The scene also renders a procedural volumetric cloud deck. Its direct-light direction and atmosphere-attenuated RGB are read from DayNight every frame, so noon cloud silverlining and warm sunset glow remain synchronized with the sky and scene lighting.

A 3D diorama that demonstrates the EVEngine DayNight module: a time-of-day solar orbit, a procedural skybox that rotates with the sun, and switchable night lighting systems (moonlight, starlight, fire, fireflies).

Run

eve run examples/daynight

Controls

Space — pause / resume the clock.
Up / Down — speed up / slow down the day.
Left — reset to solar noon.
L — toggle moonlight.
F — toggle fireflies.
M — toggle the campfire point light.
Camera auto-orbits the diorama.

Scene

Trees, pillars and rocks on a disc ground plane. The DayNight module drives the directional sun (angle + warm falloff), the procedural sky cubemap (IBL environment with a sun disc and night stars), the clear color, and the camera ambient. Below the horizon the named night-light systems come alive as Light3D entities: a cool moon directional light, a starlight ambient boost, a warm fire point light and a ring of gently-drifting fireflies.