Space Skyboxes: 20 Stylized Skies (Godot 4 + Unity)

Twenty stylized space skies for 3D games, ready for Godot 4 and Unity.

Launch sale: 25% off until 7 October ($2.99), or all three skybox packs for $7.50 in the Discounted Skyboxes bundle. The free Skybox Sampler has two skies from each pack in the same formats.

Nebulae, a ringed gas giant, a black hole, a spiral galaxy, binary suns, an eclipse and quiet deep starfields. Each sky is a full 360 degree environment with no seams and no pinching at the poles, so it works as a skybox, a backdrop or a light source.

The 20 skies
01 Teal & Magenta Nebula, 02 Ember Nebula, 03 Emerald & Gold Nebula, 04 Deep Blue Nebula, 05 Crimson Nebula, 06 Milky Way Band, 07 Deep Void, 08 Spiral Galaxy, 09 Ringed Gas Giant, 10 Cratered Moon, 11 Binary Suns, 12 Total Eclipse, 13 Asteroid Belt Glow, 14 Supernova Remnant, 15 Ionized Gas Ribbons, 16 Black Hole, 17 Pastel Dream, 18 Globular Cluster, 19 Ocean World, 20 Pulsar Jets.

What you get

• 20 panoramas at 2048 x 1024 (PNG) and 4096 x 2048 (JPG)
• 1024 x 1024 cubemap faces for every sky, named for both Godot (px, nx, py, ny, pz, nz) and Unity (Front, Back, Left, Right, Up, Down)
• A Godot 4 addon with a sky material and an Environment for each sky, plus a demo scene
• README, a Unity import guide and the license

A second download has the 20 panoramas as lossless 4096 x 2048 PNG. The free sampler has 3 skies (Teal & Magenta Nebula, Ringed Gas Giant, Supernova Remnant) at lower resolution, so you can test the import before buying.

Using it

• Godot 4: copy godot/addons/space_skyboxes into your project and assign an environments/<sky>.tres to a WorldEnvironment. Tested in Godot 4.5. In the Compatibility renderer, use the panorama skies rather than the cubemaps.
• Unity: import the six PNGs from cubemaps_unity/<sky>/ into a Skybox/6 Sided material (Front, Back, Left, Right, Up, Down); UNITY.md has the steps. Checked in Unity 6000.0.84f1: the faces line up with no seams, horizon level, sky upright. Works in Built-in and URP.
• Other engines: anything that takes equirectangular panoramas or six-face cubemaps (Unreal, Bevy, three.js, Blender).

Good to know
Images are 8-bit LDR sRGB, not HDR. The planets, moon and black hole are stylized paintings, not simulations. Seams were checked numerically on every cube edge and at the panorama wrap.

License
Royalty-free for commercial and non-commercial games, apps and videos. No attribution required. You may modify the images for your own projects, but you may not resell or redistribute them as assets. Full text in LICENSE.txt.

AI disclosure
Made with AI assistance: the skies are painted by code that an AI wrote, then checked by eye.

More from The_KnightShift

• Stylized Sky Skyboxes: 16 Day, Sunset, Night and Storm Skies ($3.99)
• Alien Worlds Skyboxes: 16 Exoplanet Skies - twin suns, ringed giants, ice worlds ($3.99)
• Stylized Seamless Materials: 24 Tileable PBR Textures ($5.99)
• Skybox Sampler: 6 Free Skies - free, same formats, try the import first

All three skybox packs are 25% off in the Discounted Skyboxes sale until 7 October: $2.99 each or $7.50 for all three.