Astral Fjord Skybox – Procedural Aurora Shader for Unity

Astral Fjord Skybox is a fully procedural skybox shader for Unity, designed for stylized / low-poly / VR games.
No textures required – the entire sky is generated in the shader and can be fine-tuned directly from the material inspector.

✨ Features

• Gradient sky with customizable top/bottom colors

• Twinkling stars

  • diamond-shaped, slightly concave for a magical look

  • random size, density, and brightness

  • star density focused around the “equator” (fewer stars near the poles)

• Animated cloud streaks

  • multiple layers at different heights

  • thin → thick → thin along their length

  • each layer has its own speed and offset

• Animated northern lights (aurora borealis)

  • flowing sine-wave band around the sky

  • 3-color gradient with two editable gradient stops

  • controllable height, thickness, intensity and bottom fade

  • tilt angle & axis so the aurora doesn’t have to be perfectly horizontal

🎛 Fully customizable

You can fine-tune almost everything:

Stars

• colors (HDR for neon glow)

• size min/max

• density & equator focus

• twinkle speed and strength

Clouds

• color & intensity

• density and tiling

• layer count, base height and vertical spacing

• thickness min/max, softness and edge sharpness

• scroll speed per layer

Northern Lights

• 3 gradient colors + 2 gradient stops

• height, amplitude and thickness of the band

• number of waves around the sky

• scroll speed

• tilt angle & axis

📦 Included

• 1 procedural skybox shader

• example skybox materials

• demo scene(s) to preview the sky

• basic documentation

🕹 Ideal for

• low-poly / stylized games

• VR experiences (no extra geometry, just a skybox)

• magical / nordic / sci-fi environments