FDM Standards
Our quality framework ensures every model on FDM Foundry prints reliably on standard FDM printers. These standards are what make our marketplace different.
Why standards matter
Most 3D model marketplaces let anyone upload anything. The result? Buyers waste filament on models that fail, and talented creators get buried under low-quality uploads. FDM Foundry's standards exist to protect both sides of that equation.
< 5%
Print failure rate target
0.4mm
Standard nozzle baseline
48h
Average review turnaround
Print Compatibility
Models must work on common consumer FDM printers without specialized hardware.
Build Volume
Models (or their individual parts) should fit within a 220 × 220 × 250mm build volume. Larger models must be split into printable sections with alignment features.
Nozzle Compatibility
All models must print cleanly with a 0.4mm nozzle. Designs may optionally note enhanced results with 0.2mm nozzles, but 0.4mm is the baseline.
Layer Height
We know smaller is better, but models should produce good results at 0.08–0.12mm layer heights. Recommended settings should be provided with each listing.
The right Materials
PLA is the golden standard for miniatures, but some functional models like terrains might specify PETG as recommended material due to it's flexibility. Usually RPG miniatures and props do not require ASA or ABS.
Design Requirements
These structural requirements ensure models print reliably and look great.
Wall Thickness
- Minimum 1.2mm for structural walls
- Minimum 0.8mm for decorative elements
- No single-wall features unless intentional
Overhangs & Bridges
- Max 45° overhangs without supports
- Bridges under 20mm recommended
- Include support-free variants when possible
Detail & Scale
- 28mm or 32mm heroic scale standard
- Fine details must survive 0.2mm layer height
- Scale variants appreciated (75mm, etc.)
Structural Integrity
- Models should be watertight and manifold
- No internal geometry errors or non-planar faces
- Clean mesh with no inverted normals
File Standards
Consistent file delivery ensures a smooth buyer experience.
| Requirement | Standard |
|---|---|
| File format | STL (required), 3MF (recommended) |
| Naming convention | ModelName_Variant_Support.ext |
| Supported versions | Pre-supported variant included when applicable |
| Organization | Logical folder structure for multi-part models |
| Print profile | Recommended settings in listing description or included file |
| Orientation | Models oriented for optimal print quality |
Testing Expectations
We trust our creators, but we expect models to be tested before submission.
Before you submit
- Print-test at least one version of the model on an FDM printer
- Verify the model slices without errors in at least one major slicer (Cura, PrusaSlicer, or OrcaSlicer)
- Confirm all parts fit together if the model is multi-piece
- Include a photo or render of the actual printed result in your listing
- Document any known printing challenges and how to address them
We understand not every creator has access to multiple printer models. If your testing is limited to one machine, that's okay — just be transparent about it in your listing.