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Documentation Index

Fetch the complete documentation index at: https://docs.3dpreppro.com/llms.txt

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Hollow tool settings panel
Hollow creates an empty interior inside your model, leaving only a shell of the specified thickness. This dramatically reduces material usage, printing cost, and weight.

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When to use this

For large models where a solid print would waste material, or when you want to reduce weight without changing the outer appearance.

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Settings

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Shell thickness (0–20 mm)

How thick the outer walls should be. Set to 0 to keep the model solid (off). Default: 0 (off).

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Step by step

1

Select the Hollow tool

Click Hollow in the toolbar.
2

Set shell thickness

Enter a value in mm. 2–3 mm works well for most full-color printers.
3

Run a repair

Hollowing is applied during the repair process.

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Tips

  • 2–3 mm shell thickness is typical for full-color printers
  • Make sure the shell is at least as thick as the Wall Thickness setting
  • Use the Slice View tool after repair to verify the hollow interior looks correct
Very thin shells (under 1 mm) may not be strong enough to hold their shape after printing.