> For the complete documentation index, see [llms.txt](https://docs.viesus.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.viesus.com/features/features/shadow-highlight-recovery.md).

# Shadow & Highlight Recovery

Recovers detail in the darkest and brightest regions of an image — lifting blocked-up shadows and reining in blown-out highlights. The factors scale how strongly VIESUS corrects each region.

## Example

{% columns %}
{% column %}
**Before**

<figure><img src="https://919968377-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FG3eQlcnlDKtn9yl3mxsx%2Fuploads%2Fgit-blob-2aac38d3a6989f640b75c2aeecf11934ec13a3c3%2Fplaceholder.svg?alt=media" alt="Before — Shadow &#x26; Highlight Recovery"><figcaption></figcaption></figure>
{% endcolumn %}

{% column %}
**After**

<figure><img src="https://919968377-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FG3eQlcnlDKtn9yl3mxsx%2Fuploads%2Fgit-blob-2aac38d3a6989f640b75c2aeecf11934ec13a3c3%2Fplaceholder.svg?alt=media" alt="After — Shadow &#x26; Highlight Recovery"><figcaption></figcaption></figure>
{% endcolumn %}
{% endcolumns %}

## Parameters

<table><thead><tr><th width="139.2000732421875">Parameter</th><th width="100">Section</th><th width="95">Range</th><th width="95">Default</th><th>Description</th></tr></thead><tbody><tr><td><code>shadowfac</code></td><td><code>Lpars</code></td><td>0.0 – 1.0</td><td>0.5</td><td>Shadow region correction factor</td></tr><tr><td><code>highlightfac</code></td><td><code>Lpars</code></td><td>0.0 – 1.0</td><td>0.5</td><td>Highlight region correction factor</td></tr></tbody></table>

{% hint style="success" %}
**Recommended:** Leave both factors at 0.5 — VIESUS already balances shadow and highlight detail automatically. Raise a factor for stronger recovery in that region, or lower it to keep more of the original tonal contrast.
{% endhint %}


---

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