Expanse Volumetric Skies, Clouds, and Atmospheres in HDRP

Try game asset Expanse Volumetric Skies, Clouds, and Atmospheres in HDRP 1.3 Unity for free.

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Expanse is a state of the art volumetrics tool for HDRP that gives you the power to author beautiful skies, clouds, and fog banks. In as little as 15 minutes, you can create compelling and interactive atmospheres---earthly, mythical, and stylized.

The rendering and authoring strategies that Expanse uses are based on the most recent production-focused papers coming out of conferences like SIGGRAPH and EGSR. Every component of Expanse is physically-based, allowing for unprecendented realism and consistency across different lighting conditions.

Expanse is a fully dynamic system that can be adjusted in realtime, with no precomputed lookups that slow down the authoring process. Things like cloud coverage, fog density, and time of day can easily be animated with keyframes or scripted to create different weather scenarios. All the changes you make are visible in the editor, so you can tweak your sky without ever having to enter play mode.

Expanse is also performance-optimized for realtime applications. You can pick and choose between a number of quality/performance tradeoffs to optimize your sky to hit your frame time requirements. For reference, on a last-gen 2080 Ti, Expanse can render an entire sky with volumetric atmosphere, clouds, and fog in under 0.7ms.

While not necessarily VR-first, Expanse does support single pass instanced VR. Support is still experimental in nature, but will gradually transition to being labeled \"production ready\" as more users test it. Expanse only supports the VR platforms that HDRP supports.

If you need to make modifications to Expanse, no problem---you'll receive all C# scripts and shaders uncompiled when you purchase Expanse. If you create a cool feature or fix a bug, let me know at three.ms. and maybe I'll work it into the next release!

As a note: I'm an independent developer with no QA team, so I appreciate your patience regarding bug fixes and support!

Expanse is licensed on a per-seat basis. As provided for by the asset store EULA, you will need to purchase a license for each individual who will use Expanse. For details refer to the asset store EULA or EULA FAQ.


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  • Unity
  • 1.3
  • 105933