| .. | ||
| Materials | ||
| Textures | ||
| Materials.meta | ||
| readme.txt | ||
| readme.txt.meta | ||
| Source.zip | ||
| Source.zip.meta | ||
| Textures.meta | ||
to add skyboxes to your scene, just drag the skybox materials in Materials folder to your scene by using Render settings (or Lighting Tab in Unity 5). A Source file is included also in the package. It's using a popular app called blender, so the extension would be .blend