Skyboxer

Skyboxer turns any image (a photo, a painting, concept art or a panorama) into a seamless skybox ready for your game. It detects the horizon, closes the 360° seam and builds the six cube faces from a single panorama, so the edges always line up.

You can still set the mood of the sky, patch flaws with a clone brush and export everything for your engine in one go. It works 100% offline: your images never leave your computer.

Features

- Real-time horizon height

- Color, fog, stars, Milky Way, sun and moon

- Clone brush and guide lines

- 3D viewer (from inside, cube or sphere)

Export

- 6 PNG faces, cube cross and panorama as PNG or HDR

- DDS cubemap and lighting data

- Presets for Unity, Unreal, Godot, Blender, Three.js and more

Extras

- 9 languages

- Two visual themes

- Saves projects and presets

How to run

Right in the browser or as a Windows program (.exe). The .exe needs Edge, Chrome, Brave or Vivaldi installed and is not digitally signed (Windows may show a warning the first time).

Credits

Made by TomFelix. BoldPixels font by Yūki (CC BY-SA 4.0). Sound effects: Ultimate UI SFX Pack by JDSherbert.