3D printing miniatures in resin can produce stunning tabletop-ready models — sharp armor edges, detailed faces, and smooth surfaces ready for painting. But small setup mistakes can completely ruin a print.
Whether you’re printing 40mm fantasy miniatures or smaller tabletop RPG models, avoiding these five common mistakes will dramatically improve your results and reduce wasted resin.
1. Incorrect Exposure Settings
Exposure settings determine how well each resin layer cures. Too little exposure leads to weak layers and failed prints. Too much exposure causes soft details and brittle parts.
How to Avoid It
- Run a calibration test before printing miniatures
- Use manufacturer-recommended exposure as a baseline
- Adjust in small increments (0.1–0.2 seconds)
2. Printing Miniatures Flat on the Build Plate
Printing a miniature flat increases suction force and can damage fine surface details. It also increases visible layer lines.
How to Avoid It
- Angle miniatures 30–45 degrees
- Orient delicate parts upward when possible
- Reduce large flat surfaces parallel to the plate
3. Weak or Poorly Placed Supports
Thin elements like weapons, fingers, or ears require proper support. Weak supports can cause mid-print detachment or warped parts.
How to Avoid It
- Use pre-supported STL files if available
- Increase support tip diameter for heavier models
- Check for unsupported “islands” in your slicer
4. Skipping Proper Washing and Curing
Incomplete washing leaves sticky resin on the surface, while over-curing can make miniatures brittle and fragile.
How to Avoid It
- Wash prints in IPA for 2–5 minutes
- Allow prints to fully dry before curing
- Cure according to size — avoid excessive UV exposure
5. Scaling Without Adjusting Supports
Scaling a miniature changes its weight and structural needs. If you scale a pre-supported file too much, supports may become ineffective.
How to Avoid It
- Scale unsupported STL files first
- Regenerate supports after scaling
- Increase support thickness for larger prints
Improve Your Miniature Printing Skills
- [How to 3D Print Perfect Resin Miniatures]
- [Best Resin Settings for 40mm Miniatures]
- [Browse 3D Printable Fantasy Miniatures]
Frequently Asked Questions
Why do my miniatures lose fine detail?
Overexposure or incorrect layer height can soften surface detail. Adjust exposure and reduce layer height for better results.
How can I reduce failed prints?
Calibrate exposure, angle your prints correctly, and ensure proper support placement.
Are pre-supported STL files better for beginners?
Yes. Pre-supported files reduce setup errors and improve success rates for new resin printing users.