> ## Documentation Index
> Fetch the complete documentation index at: https://docs.liminaltattoo.es/llms.txt
> Use this file to discover all available pages before exploring further.

# Frequently asked questions

> Troubleshoot technical-sheet confirmation, Color Engine inventory, Piel Viva alignment, and FISIO placement states.

Here are answers to common questions about the four LIMINAL beta tools.

> [accordion] Why is technical-sheet generation disabled?
>
> Confirm the design analysis first. **Ready** still means pending artist confirmation. Return to the design screen, review its details and use the confirmation action.

> [accordion] Why does Color Engine show no candidate or mix?
>
> Open **Mi tinta**, declare your actual stock and save it. Automatic mix suggestions need eligible documented references. Never replace missing evidence with an invented recipe.

> [accordion] Can I use a HEX value as an ink recipe?
>
> No. HEX is a display-colour sample. Any proposed MIX is an estimated visual starting point that requires testing and artist verification.

> [accordion] Why is Piel Viva's comparison slider unavailable?
>
> You need two different photos and confirmed manual alignment. Side-by-side viewing remains available before alignment.

> [accordion] What does a limited photographic comparison mean?
>
> Lighting, framing, image quality, positioning or insufficient overlap can prevent a trustworthy comparison. Review or retake the photographs.

> [accordion] Why does FISIO not show a design on the model?
>
> Check the session for a saved body model, valid placement and accessible design attachment. Outdated placement data must be reviewed in the session.

> [accordion] Why can I not save FISIO decisions?
>
> Save pending placement changes, choose a decision for every observation and ensure the session is editable. Closed and archived sessions are read-only.

> [accordion] Can these tools diagnose a health condition?
>
> No. Piel Viva documents visible photographic differences, and FISIO uses generic reference geometry. Neither is a medical diagnostic tool.

## Related guides

* [Generate a technical sheet](https://docs.liminaltattoo.es/en/sheets/create.md)
* [Color Engine](https://docs.liminaltattoo.es/en/color/guide.md)
* [Piel Viva](https://docs.liminaltattoo.es/en/piel-viva/guide.md)
* [FISIO](https://docs.liminaltattoo.es/en/fisio/guide.md)


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