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Cosmic Skybox Generator is a powerful Unity tool for creating breathtaking space skyboxes with procedural nebulae and stars. Supports Built-in, URP, and HDRP pipelines. Includes 12 presets

Render pipeline compatibility

The Built-in Render Pipeline is Unity’s default render pipeline. It is a general-purpose render pipeline that has limited options for customization. The Universal Render Pipeline (URP) is a Scriptable Render Pipeline that is quick and easy to customize, and lets you create optimized graphics across a wide range of platforms. The High Definition Render Pipeline (HDRP) is a Scriptable Render Pipeline that lets you create cutting-edge, high-fidelity graphics on high-end platforms.

Unity Version	Built-in	URP	HDRP
6000.0.41f1	Compatible	Compatible	Compatible

Additional compatibility information

tool generate a cubemap dds texture witch may use in any RP

Description

Bring your space environments to life with the Cosmic StarBox Generator - a powerful procedural skybox editor for Unity.

This tool allows you to generate high-quality, HDR cubemap textures featuring realistic nebulae and star layers. Whether you're creating a sci-fi game, space simulation, or cosmic adventure, this asset provides endless customization with multi-layered noise patterns and adjustable star effects.

With support for Built-in, URP, and HDRP, the generator automatically updates the skybox material for the current render pipeline.

You can fine-tune nebula density, color gradients, contrast, and blending modes, while the star system lets you adjust size, count, halos, and even star rays for a truly immersive celestial experience.

The editor includes 12 ready-to-use JSON presets, helping you quickly generate stunning space backgrounds. Plus, the detailed documentation ensures you can get started immediately, whether you need quick previews (256x256 resolution) or high-quality production skyboxes (up to 4096x4096 resolution, 0.75 Gb texture size).

Technical details

Fully Procedural Space StarBox Generator – Create infinite variations of nebulae and stars.
Supports Built-in, URP & HDRP – Automatically applies textures to the correct skybox material.

Adjustable Resolution – From 256x256 (fast preview) to 2048x2048 (high-quality).

Multi-Layer Nebula System – Customize gradient colors, noise type (Perlin, Fractal, Ridged, FBM), scale, contrast, and blending mode.

Advanced Star System – Control star count, size, HDR color, halos, rays, and intensity.

Optimized Performance – Uses parallel processing for fast generation.

Exports DDS Cubemap Textures – Compatible with Unity’s default skybox materials.

12 Ready-to-Use Presets – Quickly generate stunning space scenes.

Full Documentation Included – Step-by-step guide for easy setup and customization.

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Related keywords

galaxy background Skybox Skybox Generator URP Space Shader HDRI Space Procedural skybox Starfield Skybox Realistic Space Space Scene Generator Sci-Fi Skybox star Editor Tools Sky Environment HDRP Skybox