Procedural Dynamic Skybox: Day & Night Cycle with Stars, Clouds & Moon

Fully Procedural Day & Night Skybox for Built-in, URP and HDRP. Fast, optimized and mobile-ready: the entire sky is one combined shader that handles everything by itself.

🌅 DEMO AVAILABLE! 🌅Try every preset yourself RIGHT HERE: don't just look at the sky, play around with it! 🎮 Android | Windows

The whole sky (gradient, sun or moon, stars and clouds) is a single shader pass driven by one profile asset you author in seconds, save as a preset, and swap at runtime. Drop in one component, pick a profile, press Play. No camera stack, no per-frame scripts, no post-processing: the shader does the work on its own.

Features:

- One combined skybox pass renders the entire sky in Shader Model 2.5 with zero per-frame CPU cost. No Update loop, no per-camera script. Built for mobile and WebGL budgets.

- Three-stop HDR gradient sky with an adjustable horizon falloff, from noon blue to fantasy dusk. Nudge it and the same sky goes from clear noon to alien dusk to the red glow over a burning city.

- Sun or moon disk with authored size, color and halo glow. As it sets, the horizon tints toward it.

- Generate your own star fields and cloud sheets right inside the profile inspector. Change a single number and it's a different sky. Nobody else will ship yours.

- Twinkling stars with an optional Milky Way band, tweak to your liking.

- Tileable drifting clouds with dynamic intensity and speeds.

- Drives your directional light and ambient straight from the sky, your night profile lights look like night.

- Day & night cycle and cross-fades between any two profiles, both as sample scenes you own and edit.

Included:

- 5 ready-made profiles, 3 moon faces, 4 star cubemaps, 4 cloud sheets.

- 2 sample scenes ready to play with.

- Full C# and shader source, 19 edit mode tests, README and samples guide.

- Zero dependencies, no plugins, no DI container. It compiles in an empty project.

Perfect for mobile, WebGL, RPG, adventure, stylized and open-world games.