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Expanse - Volumetric Skies, Clouds, and Atmospheres in HDRP

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…

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  • Version: 1.3
  • SKU: 31367
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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.