Infill is the internal structure of a 3D print, providing strength and support. It can be adjusted to balance material usage, print time, and part strength.

Density usually should be calculated as a % of the total infill volume, not the total print volume. Higher density increases strength but also material usage and print time. Lower density saves material and time but reduces strength.

Nevertheless, not all patterns interpret density the same way, so the actual material usage may vary. You can see each pattern's material usage in the Sparse Infill Pattern section.

Infill patterns determine how material is distributed within a print. Different patterns can affect strength, flexibility, and print speed using the same density setting.

There is no one-size-fits-all solution, as the best pattern depends on the specific print and its requirements.

Many patterns may look similar and have similar overall specifications, but they can behave very differently in practice. As most settings in 3D printing, experience is the best way to determine which pattern works best for your specific needs.

Infill	X-Y Strength	Z Strength	Material Usage	Print Time
Concentric	Low	Normal	Normal	Normal
Rectilinear	Normal-Low	Low	Normal	Normal
Grid	High	High	Normal	Normal
2D Lattice	Normal-Low	Low	Normal	Normal
Line	Low	Low	Normal	Normal-Low
Cubic	High	High	Normal	Normal-Low
Triangles	High	Normal	Normal	Normal-Low
Tri-hexagon	High	Normal-High	Normal	Normal-Low
Gyroid	High	High	Normal	Normal-High
TPMS-D	High	High	Normal	High
Honeycomb	High	High	High	Ultra-High
Adaptive Cubic	Normal-High	Normal-High	Low	Low
Aligned Rectilinear	Normal-Low	Normal	Normal	Normal
2D Honeycomb	Normal-Low	Normal-Low	Normal	Normal-Low
3D Honeycomb	Normal-High	Normal-High	Normal-Low	High
Hilbert Curve	Low	Normal	Normal	High
Archimedean Chords	Low	Normal	Normal	Normal-Low
Octagram Spiral	Low	Normal	Normal	Normal-High
Support Cubic	Low	Low	Extra-Low	Extra-Low
Lightning	Low	Low	Ultra-Low	Ultra-Low
Cross Hatch	Normal-High	Normal-High	Normal	Normal-High
Quarter Cubic	High	High	Normal	Normal-Low

Fills the area with progressively smaller versions of the outer contour, creating a concentric pattern. Ideal for 100% infill or flexible prints.

• Horizontal Strength (X-Y): Low
• Vertical Strength (Z): Normal
• Density Calculation: % of total infill volume
• Material Usage: Normal
• Print Time: Normal
• Material/Time (Higher better): Normal-High

Parallel lines spaced according to infill density. Each layer is printed perpendicular to the previous, resulting in low vertical bonding.

• Horizontal Strength (X-Y): Normal-Low
• Vertical Strength (Z): Low
• Density Calculation: % of total infill volume
• Material Usage: Normal
• Print Time: Normal
• Material/Time (Higher better): Normal-High

Two-layer pattern of perpendicular lines, forming a grid. Overlapping points may cause noise or artifacts.

• Horizontal Strength (X-Y): High
• Vertical Strength (Z): High
• Density Calculation: % of total infill volume
• Material Usage: Normal
• Print Time: Normal
• Material/Time (Higher better): Normal

Low-strength pattern with good flexibility. Angle 1 and angle 2 TBD.

• Horizontal Strength (X-Y): Normal-Low
• Vertical Strength (Z): Low
• Density Calculation: % of total infill volume
• Material Usage: Normal
• Print Time: Normal
• Material/Time (Higher better): Normal

Similar to rectilinear, but each line is slightly rotated to improve print speed.

• Horizontal Strength (X-Y): Low
• Vertical Strength (Z): Low
• Density Calculation: % of total infill volume
• Material Usage: Normal
• Print Time: Normal-Low
• Material/Time (Higher better): Normal-High

3D cube pattern with corners facing down, distributing force in all directions. Triangles in the horizontal plane provide good X-Y strength.

• Horizontal Strength (X-Y): High
• Vertical Strength (Z): High
• Density Calculation: % of total infill volume
• Material Usage: Normal
• Print Time: Normal-Low
• Material/Time (Higher better): Normal-High

Triangle-based grid, offering strong X-Y strength but with triple overlaps at intersections.

• Horizontal Strength (X-Y): High
• Vertical Strength (Z): Normal
• Density Calculation: % of total infill volume
• Material Usage: Normal
• Print Time: Normal-Low
• Material/Time (Higher better): Normal-High

Similar to the triangles pattern but offset to prevent triple overlaps at intersections. This design combines triangles and hexagons, providing excellent X-Y strength.

• Horizontal Strength (X-Y): High
• Vertical Strength (Z): Normal-High
• Density Calculation: % of total infill volume
• Material Usage: Normal
• Print Time: Normal-Low
• Material/Time (Higher better): Normal-High

Mathematical, isotropic surface providing equal strength in all directions. Excellent for strong, flexible prints and resin filling due to its interconnected structure.

• Horizontal Strength (X-Y): High
• Vertical Strength (Z): High
• Density Calculation: % of total infill volume
• Material Usage: Normal
• Print Time: Normal-High
• Material/Time (Higher better): Low

Triply Periodic Minimal Surface - D. Hybrid between Cross Hatch and Gyroid, combining rigidity and smooth transitions. Isotropic and strong in all directions.

• Horizontal Strength (X-Y): High
• Vertical Strength (Z): High
• Density Calculation: % of total infill volume
• Material Usage: Normal
• Print Time: High
• Material/Time (Higher better): Low

Hexagonal pattern balancing strength and material use. Double walls in each hexagon increase material consumption.

• Horizontal Strength (X-Y): High
• Vertical Strength (Z): High
• Density Calculation: % of total infill volume
• Material Usage: High
• Print Time: Ultra-High
• Material/Time (Higher better): Extra Low

Cubic pattern with adaptive density: denser near walls, sparser in the center. Saves material and time while maintaining strength, ideal for large prints.

• Horizontal Strength (X-Y): Normal-High
• Vertical Strength (Z): Normal-High
• Density Calculation: Same as Cubic but reduced in the center
• Material Usage: Low
• Print Time: Low
• Material/Time (Higher better): Normal

Parallel lines spaced by the infill spacing, each layer printed in the same direction as the previous layer. Good horizontal strength perpendicular to the lines, but terrible in parallel direction. Recommended with layer anchoring to improve not perpendicular strength.

• Horizontal Strength (X-Y): Normal-Low
• Vertical Strength (Z): Normal
• Density Calculation: % of total infill volume
• Material Usage: Normal
• Print Time: Normal
• Material/Time (Higher better): Normal

Vertical Honeycomb pattern. Acceptable torsional stiffness. Developed for low densities structures like wings. Improve over 2D Lattice offers same performance with lower densities.This infill includes a Overhang angle parameter to improve interlayer point of contact and reduce the risk of delamination.

• Horizontal Strength (X-Y): Normal-Low
• Vertical Strength (Z): Normal-Low
• Density Calculation: % of total infill volume
• Material Usage: Normal
• Print Time: Normal-Low
• Material/Time (Higher better): Normal

This infill tries to generate a printable honeycomb structure by printing squares and octagons mantaining a vertical angle high enough to mantian contact with the previous layer.

• Horizontal Strength (X-Y): Normal-High
• Vertical Strength (Z): Normal-High
• Density Calculation: Unknown
• Material Usage: Normal-Low
• Print Time: High
• Material/Time (Higher better): Extra Low

Hilbert Curve is a space-filling curve that can be used to create a continuous infill pattern. It is known for its Esthetic appeal and ability to fill space efficiently. Print speed is very low due to the complexity of the path, which can lead to longer print times. It is not recommended for structural parts but can be used for Esthetic purposes.

• Horizontal Strength (X-Y): Low
• Vertical Strength (Z): Normal
• Density Calculation: % of total infill volume
• Material Usage: Normal
• Print Time: High
• Material/Time (Higher better): Extra Low

Spiral pattern that fills the area with concentric arcs, creating a smooth and continuous infill. Can be filled with resin thanks to its interconnected hollow structure, which allows the resin to flow through it and cure properly.

• Horizontal Strength (X-Y): Low
• Vertical Strength (Z): Normal
• Density Calculation: % of total infill volume
• Material Usage: Normal
• Print Time: Normal-Low
• Material/Time (Higher better): Normal-High

Esthetic pattern with low strength and high print time.

• Horizontal Strength (X-Y): Low
• Vertical Strength (Z): Normal
• Density Calculation: % of total infill volume
• Material Usage: Normal
• Print Time: Normal-High
• Material/Time (Higher better): Normal

Support |Cubic is a variation of the Cubic infill pattern that is specifically designed for support top layers. Will use more material than Lightning infill but will provide better strength. Nevertheless, it is still a low-density infill pattern.

• Horizontal Strength (X-Y): Low
• Vertical Strength (Z): Low
• Density Calculation: % of layer before top shell layers
• Material Usage: Extra-Low
• Print Time: Extra-Low
• Material/Time (Higher better): Normal

Ultra-fast, ultra-low material infill. Designed for speed and efficiency, ideal for quick prints or non-structural prototypes.

• Horizontal Strength (X-Y): Low
• Vertical Strength (Z): Low
• Density Calculation: % of layer before top shell layers
• Material Usage: Ultra-Low
• Print Time: Ultra-Low
• Material/Time (Higher better): Extra Low

Similar to Gyroid but with linear patterns, creating weak points at internal corners.

• Horizontal Strength (X-Y): Normal-High
• Vertical Strength (Z): Normal-High
• Density Calculation: % of total infill volume
• Material Usage: Normal
• Print Time: Normal-High
• Material/Time (Higher better): Low

Cubic pattern with extra internal divisions, improving X-Y strength.

• Horizontal Strength (X-Y): High
• Vertical Strength (Z): High
• Density Calculation: % of total infill volume
• Material Usage: Normal
• Print Time: Normal-Low
• Material/Time (Higher better): Normal