Space Skybox Generator

Space Skybox Generator is an editor-driven tool for creating procedural space skies in Unity. Tune the background, stars, nebulae, and an optional planet in the custom inspector, then export the result as an HDR equirectangular EXR skybox.

The procedural skybox can also be used directly for live previews and runtime scenes. For runtime performance, the intended workflow is to generate an HDRI and use the exported image as a conventional static skybox.

The procedural material evaluates noise, star patterns, and masks for each rendered sky pixel. This is useful for live previews and dynamic use, but can be more expensive than a conventional skybox.For a lightweight runtime sky, export an HDRI and use it with Unity's panoramic skybox material. The exported image is static: later generator changes require exporting it again.Global Noise is a grayscale multiplicative effect over the final sky color. Intensity controls its strength, Size controls pattern scale, and Contrast controls the noise range.