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Infill Patterns in 3D Printing: How to Choose the Right One

All 22 Bambu Studio patterns, grouped into five families you can actually reason about.

Infill Patterns in 3D Printing — line drawings of grid, lattice, honeycomb and gyroid infill structures

Infill is the hidden structure inside a printed part — the material between the outer walls. You never see it, yet it decides whether a part is strong, light, flexible, or simply cheap and fast to produce.

Bambu Studio alone offers 22 infill patterns, and the choice paralysis is real. This guide from InnaLab groups all 22 into five families. Once you understand the logic of each family, picking the right pattern takes seconds — not a browser full of forum threads.

First: density matters more than pattern

Before comparing patterns, one rule saves most people a lot of trouble:

Infill density usually matters more than infill type. For everyday functional parts, 15–20% is plenty. Below ~10% the pattern barely supports the top layers; above ~50% you pay in time and weight for diminishing returns. Choose density first, then pick the pattern that fits the job.

The five families

Twenty-two patterns sounds overwhelming until you notice they cluster into five groups by how they build structure. Below, each family with its members, trade-offs, and the jobs it's made for.

Linear 2D

Rectilinear · Line · Aligned Rectilinear · Zig Zag

Simple parallel lines laid down layer by layer. Rectilinear alternates direction each layer; Aligned Rectilinear keeps one direction for a consistent grain; Zig Zag prints as one continuous path for a cleaner result.

Pros

Fastest to print, minimal material, very reliable.

Cons

Anisotropic — strength depends on direction, and shear resistance is low.

Best for

Prototypes, draft models, and enclosures with no real load.

Lattice 2D

Grid · Triangles · Tri-hexagon · Cross Hatch · Cross Zag · 2D Lattice

Intersecting lines that add in-plane stiffness. Triangles and Tri-hexagon give the best shear resistance; Grid is the all-round default.

Pros

Good strength for modest material use, even in-plane rigidity.

Cons

Line crossings can stress the nozzle; still weaker along the Z axis.

Best for

General-purpose functional parts, brackets, and holders.

Volumetric 3D

Cubic · Adaptive Cubic · Gyroid · 3D Honeycomb · Honeycomb

These build structure in all three dimensions for near-isotropic strength. Gyroid's smooth waves excel where you need strength on every axis plus fluid or resin flow-through. Adaptive Cubic thickens near walls to save plastic; Honeycomb is very strong but slow.

Pros

Best mechanical performance per gram, no weak axis.

Cons

Slower, more retractions (Gyroid being the exception); Honeycomb is especially slow.

Best for

Load-bearing and engineering parts, mechanical assemblies.

Economy & Support

Lightning · Support Cubic

Material-minimizing patterns. Lightning grows a tree-like structure only where it's needed to hold up top surfaces; Support Cubic densifies solely beneath overhangs.

Pros

Fastest and cheapest, lightest possible parts.

Cons

Almost no load-bearing capacity — the part crushes easily.

Best for

Decorative figures, display and presentation models.

Decorative & Specialty

Concentric · Hilbert Curve · Archimedean Chords · Octagram Spiral · Locked Zag

Concentric follows the part's contour, making it the go-to for flexible TPU parts because it doesn't fight the flex. Hilbert, Archimedean, and Octagram create attractive patterns for translucent or artistic pieces. Locked Zag is a reinforced zigzag with interlocking joints for extra rigidity.

Pros

Aesthetics, flexibility (Concentric), striking look when backlit.

Cons

Mechanically suboptimal (Locked Zag aside), narrow use cases.

Best for

Flexible goods, lamps and lithophanes, design and art objects.

Quick selection guide

Need speed? Linear 2D — Rectilinear, Zig Zag

Need everyday strength? Grid or Tri-hexagon

Need maximum strength? Gyroid or Cubic

Need it as light as possible? Lightning

Printing flexible TPU? Concentric

Want a decorative, backlit effect? Hilbert or Archimedean

There is no single "best" infill — only the right one for the task. Match the family to the goal, set a sensible density first, and you'll get parts that are strong where they need to be and efficient everywhere else.

Have a part where the infill has to be right?

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