PrusaSlicer Infill Patterns Explained (and Which to Use)

Infill patterns in PrusaSlicer live under Print Settings > Infill. Set Fill density for how solid the part is and Fill pattern for the internal geometry. Top and bottom surfaces have their own Top/bottom fill pattern in the same section. For most parts, Grid or Gyroid at 15 to 25 percent density is the right starting point.

Where to set it

1. Open Print Settings > Infill.
2. Set Fill density (percentage).
3. Choose Fill pattern from the dropdown.

Which pattern to use

• Grid: fast, strong, simple. A solid default for functional parts.
• Gyroid: even strength in every direction, no crossing paths, and it prints cleanly. Good for flexible or evenly loaded parts.
• Cubic / Adaptive cubic: strong and material-efficient. Adaptive cubic varies density with distance from the surface to save material.
• Honeycomb / 3D honeycomb: strong but slower, with a distinctive look through translucent walls.
• Lightning: the least material and time, supporting only the top surfaces. Use it for looks-only parts.

Density

For functional parts, 15 to 25 percent is usually enough. Decorative parts can drop to 10 percent. Strength gains flatten out above roughly 40 percent while print time keeps climbing, so raise density only for parts under genuine load.

Why this matters for a print farm

Infill is a direct lever on print time and filament cost, and a small change multiplied across a production run adds up fast. The right pattern and density for a part should be set once and reused on every copy.

Because Printago slices centrally, the pattern and density you chose are baked into every copy the fleet prints, so your time and filament math holds across the whole run instead of drifting machine to machine. See print farm slicing and the PrusaSlicer overview.