What is Infill in 3D Printing?
How infill works
3D prints are usually hollow inside, with a pattern (gyroid, grid, triangles, honeycomb) filling the interior to support the top layers and add strength. The percentage controls how dense that pattern is.
Choosing infill
| Infill | Use |
|---|---|
| 10 percent | Decorative pieces, vases (sometimes 0%) |
| 15 to 20 percent | Everyday default for visual prints |
| 30 to 40 percent | Light functional parts |
| 50 to 60 percent | Mechanical brackets, mounts |
| 80 to 100 percent | Engineering parts under heavy load |
Infill patterns
- Gyroid: strong in all directions, modern default
- Cubic: good general strength
- Triangles: classic, strong
- Honeycomb: strong, slow to print
- Lines: fastest, weakest
- Concentric: matches outer shape, decorative