> For the complete documentation index, see [llms.txt](https://lupa-ai-documentation.gitbook.io/lupa-ai-documentation/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://lupa-ai-documentation.gitbook.io/lupa-ai-documentation/flux.md).

# Flux

<details>

<summary><strong>Overview</strong></summary>

Flux Mode is the most **balanced and versatile** option in Lupa AI.\
It is designed to perform well across nearly any image type — from renders and artwork to photos and marketing visuals — without introducing errors or distortion.

This mode is ideal when you want high quality output with minimal risk of:

* Artifacts
* AI hallucinations
* Layout distortions
* Over-enhancement

It combines the clarity of High Fidelity with some creative flexibility of the Creative mode, but always staying stable and professional.

**Recommended if you're unsure which mode to use.**

**New:** Portrait Sharpen

\
Flux now includes **Portrait Sharpen**, a specialized enhancement designed to improve **sharpness, skin texture and facial detail** in close-up images.\
It works especially well for:

* Studio-style portraits
* Fashion or product shots featuring faces
* Images where realism and sharpness are critical

⚠️ While it enhances skin and eyes with precision, Portrait Sharpen avoids artificial textures or stylistic effects — making it ideal for commercial and editorial use.

>

</details>

<details>

<summary><strong>Key Adjustable Settings</strong></summary>

* **Prompt (optional)**\
  A short description of what's in the image.\
  This helps guide the model when interpreting complex content.\
  Example: *“glass perfume bottle on a white background”*
  * *Detect from image =* AI automatically describes the selected image

<div align="left"><figure><img src="/files/DIYakC3e5E4iQ1UDb4FV" alt="" width="232"><figcaption></figcaption></figure> <figure><img src="/files/R4OVQD5uSJyOBAWr7LRU" alt="" width="349"><figcaption></figcaption></figure></div>

* **Scale Factor**\
  Choose between x2, x4, x6, x8 or x10 enlargement.\
  Larger scale increases resolution and detail — but also processing time and credit usage.

<div align="left"><figure><img src="/files/M95fhMHpIPycspeGnFux" alt=""><figcaption></figcaption></figure></div>

* **Creativity (slider)**\
  This controls how much freedom the AI has to modify details:\
  \- Low = faithful upscaling with subtle fixes\
  \- High = deeper transformation and enhancement\
  ⚠️ Use with caution if you want to preserve the original image closely.

<div align="left"><figure><img src="/files/FFJROlUTFR6ysKeV7X1z" alt=""><figcaption></figcaption></figure></div>

#### Portrait Sharpen (toggle)

This is a dedicated enhancement toggle for portraits and close-up faces.\
When enabled, it improves **sharpness**, **skin texture**, and **fine facial detail**, avoiding over-stylization.

To activate it:

> Click the **"Portrait Sharpen"** button that appears after selecting **Flux** mode.

<figure><img src="/files/MgoKrlSAE6VO05B3wtqv" alt=""><figcaption></figcaption></figure>

Creative mode:

* Offers the most artistic freedom.
* The AI may slightly reinterpret facial features, textures, and lighting.
* Best for stylized portraits or fantasy results.
* **Not recommended** for blurry or distant faces, as it may generate unwanted artifacts.

Ultra Leal Mode:

* Prioritizes **faithfulness** to the original face.
* Keeps proportions, structure, and features as close to the source as possible.
* Very low tolerance for hallucination.
* Also **not ideal for blurry or low-res faces**, as it tries to preserve what’s already there without much invention.

Ultra Real Mode:&#x20;

* Strikes a balance between realism and enhancement.
* Adds realistic **4K skin texture**, refines facial features, and enhances eyes and hair.
* May **slightly alter facial features** for a more photographic or commercial look.
* Ideal for **improving AI-generated or soft-looking faces** with added realism.

</details>

<details>

<summary><strong>Best Use Cases</strong></summary>

* Concept art or environment scenes

<div align="left"><figure><img src="/files/zGZ9R11bGjOIbsJ0Snte" alt=""><figcaption></figcaption></figure></div>

<figure><img src="/files/qTsrmMaXAWsBU3DV4DZ2" alt=""><figcaption></figcaption></figure>

<figure><img src="/files/AddITpXP1t8RjB1aI4pP" alt=""><figcaption></figcaption></figure>

<figure><img src="/files/UqCMJsDBikWVqRji2Xx1" alt=""><figcaption></figcaption></figure>

<figure><img src="/files/4V7oayH9SQGjO2by02ZA" alt=""><figcaption></figcaption></figure>

<figure><img src="/files/r16ACB5mN9cvJARMDWWM" alt=""><figcaption></figcaption></figure>

* Photos with moderate quality issues

<figure><img src="/files/SRjvHBsmTsWZZsDFolVc" alt=""><figcaption></figcaption></figure>

<figure><img src="/files/fVMr0DYmo7rOJN9QnOFK" alt=""><figcaption></figcaption></figure>

<figure><img src="/files/OoWeKlJv33Hb8ktLVRhE" alt=""><figcaption></figcaption></figure>

* Portrait (Portrait Sharpen Activated)

<figure><img src="/files/DrTzR9giOjH48QpibWjs" alt=""><figcaption></figcaption></figure>

<figure><img src="/files/EUIjTeYvDpmh0JaGb34w" alt=""><figcaption></figcaption></figure>

<figure><img src="/files/PfTELwsNTS6XQYCpT0Wn" alt=""><figcaption></figcaption></figure>

<figure><img src="/files/6q4aJakdhgvZqTbgcdY6" alt=""><figcaption></figcaption></figure>

⚠️**Not recommended for:**

* Stylized artwork needing texture addition → use Creative
* Extreme abstraction or surreal edits

</details>