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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.

Five lattice pattern types: Cubic, BCC, Octet, Diamond, Gyroid
Lattice Infill fills the interior of your model with a repeating geometric structure. This reduces material while maintaining strength — and can create stunning visual effects for display models.

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When to use this

  • For artistic lattice effects on display models
  • When you need precise control over internal structure
  • To reduce material usage while keeping strength
  • For models where you want the lattice to be visible

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Lattice patterns

PatternStyleDescription
CubicStrut-basedSimple grid of axis-aligned struts. Clean, predictable look.
BCCStrut-basedBody-centered cubic with diagonal struts. Stronger than cubic.
OctetStrut-basedDense network of struts. Very strong, uses more material.
DiamondStrut-basedTetrahedral connections. Organic, crystal-like appearance.
GyroidSmooth surfaceContinuously curved surface. Beautiful organic look, excellent strength-to-weight.
Gyroid lattice infill inside a model

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Settings

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Cell size (mm)

The size of each repeating unit. Smaller = denser lattice. Default: 5 mm.

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Strut thickness (mm)

Diameter of the connecting struts. Only for Cubic, BCC, Octet, and Diamond. Default: 0.5 mm.

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Shell thickness (mm)

Wall thickness of the Gyroid surface. Only for Gyroid. Default: 0.6 mm.

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Interior offset (mm)

Shrink or expand the lattice region relative to the model surface. Positive = shrink inward. Negative = expand outward. Default: 0.

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Include shell

Toggle (default: on). Keeps the outer surface of your model intact around the lattice.

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Surface mode (Gyroid only)

When on, creates a lattice band that conforms to the model surface instead of filling the entire interior.
  • Band thickness — Width of the surface band
  • Surface expansion — Push the band outward
  • Fill interior — Also fill the interior below the band

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Material color

Choose a color for the lattice geometry from 16 presets or a custom color picker.

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Step by step

1

Select the Lattice tool

Click Lattice in the Interactive Tools section.
2

Choose a pattern

Click one of the five pattern tiles.
3

Adjust cell size

Smaller cells = denser, stronger lattice. Larger cells = lighter, more open.
4

Set thickness

Adjust strut thickness (strut patterns) or shell thickness (Gyroid).
5

Apply

Click Apply to generate the lattice.

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Tips

  • Gyroid is the most popular choice — strong, beautiful, and prints reliably
  • Cell sizes below 3 mm may be too fine for FDM printers
  • Use interior offset to prevent the lattice from touching the outer surface
  • Use the Slice View tool to inspect the lattice interior
Very small cell sizes with thick struts create extremely dense lattices that take a long time to process and produce very large files.