Key takeaways
- A LayerHub preset is tied to a specific filament and a specific printer model — not generic “PETG settings”.
- Proof of Print is a real photo, not a render. It proves the preset worked once, on one machine — not that it will on yours.
- LayerHub normalises parameter names between slicers on upload, so a preset made in OrcaSlicer can be used in Bambu Studio.
- Polymaker open-sourced its preset workflow (GPL-3.0): cooling → temperature → max volumetric flow → flow ratio → pressure advance → retraction, each step locking one variable.
- The parts to recheck on your own printer are the machine-dependent ones: max flow, pressure advance and flow ratio. Temperature and cooling usually travel with the spool.
Every new spool raises the same question: which settings. The default answer is the slicer's “Generic” profile — written for an average plastic, not the spool in your hand. In September 2026 Polymaker opened LayerHub to fill that gap with presets contributed by users and filament brands, under one condition earlier preset dumps never had: a real print photo.
What LayerHub is
- A filament preset library at layerhub3d.com. Each preset is tied to one filament and one printer model.
- Brands: Polymaker and 3D-Fuel at launch, with more to follow according to Polymaker. Polymaker's own preset download page (presets.polymaker.com) now points to LayerHub too.
- Slicers: Bambu Studio, OrcaSlicer and PrusaSlicer. Polymaker's preset page also offers ElegooSlicer.
- Uploading: drop in the preset's JSON file, LayerHub parses it and normalises parameter differences between slicers, add a print photo, publish.
- Proof of Print (PoP): every preset must include at least one real photo of a print made with it, on standard test models.
Those three slicers share a lineage, so a preset can travel between them — but parameter names and ranges do not line up perfectly. The slicer converter deals with the same problem for whole projects.
What Proof of Print proves
A real photo rules out invented presets and presets that never ran. That is real progress over preset files floating around forums. But a photo only proves that this preset gave one good print, once, on one printer, with one spool — at that spool's moisture, with that nozzle, on that plate. Polymaker's own wiki says its presets were made to give the creator a successful print, and any model may need further tweaks.
A preset describes someone else's printer and spool. It is a good starting point, not an answer.
Which settings follow the spool, which follow the printer
| Setting | Depends mainly on | When borrowed from someone else's preset |
|---|---|---|
| Nozzle temperature | The spool | Usually fine; check if your chamber runs very differently |
| Cooling fan | The spool and the printer's fan design | Fine on the same printer model |
| Max volumetric flow | Hot end, nozzle, extruder | Recheck — it is your speed ceiling, and wrong means under-extrusion |
| Flow ratio | Actual filament diameter, extruder | Recheck per spool |
| Pressure advance | Extruder, path length, temperature | Recheck; many newer printers measure it themselves |
| Retraction | Extruder, spool moisture | Test if you see stringing; dry first |
Polymaker's six-step workflow
Alongside LayerHub, Polymaker open-sourced its Filament Preset Tuning Suite on GitHub under GPL-3.0 — the process it says it has used internally for over a year to build presets. The first condition is a mechanically sound printer with a verified extruder. Then the tests run in order, each locking one variable before the next:
- 01
Cooling
Find fan thresholds for geometry, bridging and strength.
- 02
Temperature
Define the usable temperature window with a temperature tower.
- 03
Max volumetric flow
Find the highest reliable extrusion rate in mm³/s.
- 04
Flow ratio
Tune the extrusion multiplier so delivered plastic matches what the slicer computes.
- 05
Pressure advance
Compensate for melt-stream inertia as the head accelerates and decelerates.
- 06
Retraction
Reduce stringing and travel artefacts. Finally, print the “All in one Test” model to check the combined preset.
Using a LayerHub preset in 15 minutes
- Pick a preset for the exact filament and your exact printer model. From a preset for another printer, take only temperature and fan settings.
- Look at the Proof of Print: which test model, which angle, any visible stringing or layer lines. A blurry long shot is worth less than a close side view.
- Dry the spool if it has been open a while. Tuning retraction on a wet spool fixes the wrong fault.
- Import the preset, print a flow-ratio test and a pressure-advance test on your printer. If the printer measures pressure advance itself, let it.
- Save the result as your own preset named with the filament, colour and date — don't overwrite the original.
A correct preset cannot fix mechanics: a slack belt, a worn nozzle or a bed out of level. If prints still fail after calibration, start from the troubleshooting guide.
Frequently asked
What is LayerHub?
LayerHub is a 3D-printing filament-preset sharing platform Polymaker opened in September 2026 at layerhub3d.com. Each preset is tied to one filament and one printer model and must include a real print photo (Proof of Print).
Which slicers does LayerHub support?
Bambu Studio, OrcaSlicer and PrusaSlicer. LayerHub normalises parameter-name differences between slicers when a preset is uploaded.
Do I still need to calibrate after using a LayerHub preset?
At least recheck flow ratio and pressure advance, since they depend on your extruder and printer. Temperature and fan settings are usually fine for the same filament on the same printer model.
Does Proof of Print guarantee the preset works on my printer?
No. A real print photo proves the preset gave a good print on the uploader's printer. Your printer, nozzle and spool moisture may differ.