> ## Documentation Index
> Fetch the complete documentation index at: https://docs.3dpreppro.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Close Holes

> Automatically fill gaps and openings in your model

<Frame>
  <img src="https://mintcdn.com/alphaworks/4GKl9wpYAwI5IRWf/images/editor/tools/close-holes.png?fit=max&auto=format&n=4GKl9wpYAwI5IRWf&q=85&s=798039b876b4506049201b69c576c654" alt="Close Holes tool settings panel" width="700" height="688" data-path="images/editor/tools/close-holes.png" />
</Frame>

Close Holes detects open holes in your model's surface and fills them to create a sealed, print-ready model.

## When to use this

When your model has visible holes or gaps — common in models exported from sculpting software or game engines where surfaces aren't always sealed.

## Settings

### Max perimeter (0–1000 mm)

Only close holes smaller than this perimeter. **Default: 100 mm.** Set higher to close larger openings.

### Clearance offset (0–10 mm)

Add extra spacing around closed holes. **Default: 0 mm.**

## Step by step

<Steps>
  <Step title="Select Close Holes">
    Click **Close Holes** in the toolbar.
  </Step>

  <Step title="Adjust max perimeter">
    Set how large a hole can be before it's left open.
  </Step>

  <Step title="Run a repair">
    Hole closing is applied during the repair process.
  </Step>
</Steps>

## Tips

* Small holes (under 10 mm perimeter) are usually modeling artifacts — close them freely
* Large holes may be **intentional** (like the bottom of a vase or a window opening). Set the max perimeter lower to preserve them.
* Use the [Errors](/editor/tools/errors) tool to see how many holes exist before repair