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Structure Filling Patterns (Sparse infill patterns)

Sparse infill is the internal structure of a 3D print that balances strength, weight, flexibility, and print time. The Bambu Lab P1S (with Bambu Studio) supports a wide variety of infill patterns, each optimized for different needs.

Summary

Image Pattern Advantages Disadvantages Common Use Cases
gyroid Gyroid Isotropic, efficient, fast Slightly less rigid than grid General-purpose, flexible parts
3d-honeycomb 3D Honeycomb Very strong in X/Y/Z, aesthetic Slower, more material Strong functional parts
honeycomb Honeycomb Very rigid, classic High material usage Functional parts needing stiffness
tri-hexagon Tri-Hexagon One of the strongest patterns Slower, high material use Functional load-bearing parts
grid Grid Fast, simple, rigid in XY Less strength in Z Default for prototypes
rectilinear Rectilinear Fast, predictable Weaker diagonally General prints, prototypes
line Line Fastest, minimal filament Weak in Z, anisotropic Drafts, quick prints
cross-zag Cross Zag Balanced strength, easy removal Slightly slower General-purpose prints
lighting Lighting Very low material use for support For support only Support structures
adaptive-cubic Adaptive Cubic Variable density, efficient May create uneven strength Large parts, optimized infill
crosshatch Crosshatch Strong, rigid Harder to remove Structural parts, supports
cubic Cubic Isotropic strength Slightly more complex Mechanical parts
support-cubic Support Cubic Minimal support material For support only Support structures
triangles Triangles Very rigid in-plane Brittle under shear Brackets, flat parts
aligend-rectilinear Aligned Rectilinear Easy print, consistent direction Weaker in cross axis Simple geometries
zigzig Zigzig Fast, similar to line Weak, decorative Drafts, aesthetic lines
concentric Concentric Good flexibility, follows shape Weak structural strength TPU/flexible prints
archimedes-chord Archimedes Chord Aesthetic spiral Not optimized for strength Decorative objects
octragram-spiral Octagram Spiral Decorative, aesthetic Not structural Art, vases
hilbert-curce Hilbert Curve Continuous line, aesthetic Not strong, slow Art pieces, visual infill

Sparse Infill Percentages

The infill percentage sets how dense the internal structure is, balancing strength, weight, print time, and flexibility.

Typical guidelines:

Infill % Usage
0–5% Hollow parts, vases, pure decoration
~15% (default) Good balance for most prints, prototypes, enclosures
20–40% Functional parts, added rigidity
50% Rarely needed — for very strong or load-bearing parts
100% Maximum strength, solid parts (threads, inserts, machining)

Notes:

  • 15% is a great default — works for ~80% of prints.
  • More than 50% is rarely necessary — increases weight & time significantly.
  • 100% only for parts needing maximum rigidity, post-processing (tapping threads), or machining.
  • Gyroid / Cubic patterns are especially efficient at 15–25%.