Best 3D print settings for miniatures: dialling in clean detail

Miniatures live or die on the first 0.2 mm of detail. A sword edge, an eye socket, a cloak fold — none of it forgives a sloppy slice. The good news is you do not need an exotic printer to get a clean 28-32 mm figure. You need the right layer height, sensible speeds, and supports that actually touch the parts that need supporting.

This is what we use in the workshop when a customer sends in a printer for a tune-up and asks us to dial it in for minis.

FDM or resin: pick once, then stop second-guessing

For anything smaller than a 32 mm hero with fine features — thin spears, capes, individual fingers — resin (MSLA) will out-detail FDM every time. The XY pixel on a 4K or 8K mono LCD is around 35-50 microns, and the Z is whatever you set. FDM nozzles are 0.4 mm by default. You can drop to a 0.2 mm nozzle and get respectable results, but you are fighting the tool.

If you are printing terrain, vehicles, or chunky 54 mm+ figures, FDM is fine and often better. It is cheaper per part, no gloves, no IPA, no curing station.

Pick the right machine for the job and the settings stop being a battle.

FDM settings that actually move the needle

Assuming a 0.4 mm nozzle on a Bambu, Prusa, or well-tuned Creality, here is where we land for 28-32 mm figures.

1. Layer height: 0.08 mm or 0.12 mm. Anything thicker and faces blur. Anything thinner and you are adding hours for diminishing returns. 2. Nozzle: 0.4 mm works. A 0.2 mm nozzle helps on faces but clogs more and triples print time. Worth it only if you print minis constantly. 3. Print speed: 40-60 mm/s on outer walls. Slow the outer wall down even if the rest of the print runs faster. The outside is all the viewer sees. 4. Acceleration: cap outer wall acceleration around 500-1000 mm/s squared. High accel ringing shows up as faint echoes next to sharp features — exactly where an eye or a buckle sits. 5. Wall count: three perimeters. Two is fine for big prints but three gives more material for fine geometry to anchor into. 6. Infill: 15 percent gyroid is plenty. A miniature does not need to be strong, it needs to be light enough to paint and ship. 7. Retraction: tune it. Stringing across a cloak ruins the model. On a direct drive, start at 0.8 mm at 35 mm/s and creep up.

Filament choice matters as much as settings. PLA is the default and it is the right default. It is stiff, prints sharp, and sands well for fixing seams. PLA+ formulations are a notch tougher without losing detail. Avoid PETG for minis — it strings, it blobs on overhangs, and the slight gloss eats edge contrast under paint.

Resin settings: exposure is the whole game

On a mono LCD printer the headline numbers are exposure time, lift speed, and layer height.

1. Layer height: 0.05 mm for general work, 0.03 mm if you want every chainmail link. 2. Exposure: every resin is different, but most ABS-like and standard greys land between 1.8 and 3.0 seconds on a modern 8K printer. Run a validation matrix print (Cones of Calibration, or the resin maker's test) when you open a new bottle. Do not guess. 3. Bottom layers: 4-6 layers at 25-35 seconds. Plenty of adhesion without bulging the raft. 4. Lift speed: 60-80 mm/min for the first few mm, then faster. Slow peels save thin parts like spear tips. 5. Anti-aliasing: on. Image blur: off or very low. Modern slicers handle this better than they did two years ago.

If your faces look melted, you are overexposing. If walls flex like rubber after washing, you are underexposing or under-curing. A 1-second change in exposure is a big change — move in small steps.

Supports: where most miniatures get ruined

For FDM, tree supports are the default for organic models. Set the top contact distance to 0.2 mm (one layer at 0.2 mm height) so they peel cleanly. Bambu and PrusaSlicer both do organic trees well now.

For resin, hand-place your supports. Auto-supports are a good start but will plant a heavy support on a face or miss a sword hilt that needs one. Use light tips (0.25 mm) on faces and detailed surfaces. Use medium tips on bulk areas. Orient the model so the most detailed face points away from the build plate and is not buried in a forest of supports.

If you are tilting a figure 30-45 degrees on resin, you will almost always get a cleaner result than printing it upright. The cost is more supports and more cleanup, but the detail is worth it.

Slicer tweaks that quietly help

A few smaller settings make a visible difference on FDM minis:

• Outer-before-inner walls: turn this on. The outer wall prints against still-warm plastic underneath rather than being smeared against existing perimeters.
• Coasting or pressure advance: tune it. Sharp corners on shoulder pads and gem facets depend on the nozzle not over-extruding into the corner.
• Z-seam alignment: hide it on the back of the model or align to a sharp edge. A random seam puts a zit on the face about a third of the time.
• Ironing: usually off for minis. It flattens the very details you are trying to preserve.

On resin, the slicer matters less. Lychee and Chitubox both work. Get the exposure right and the slicer choice is a preference.

When the printer itself is the problem

Settings only matter on a machine that holds its tolerances. If your Z is binding, your belts are loose, or your bed is warped, no slicer profile rescues the print. Common things we see when a printer comes in for a miniature tune-up:

• Worn POM wheels on older Crealities causing visible Z banding.
• Loose belts giving ghosting on outer walls.
• A bent or misaligned LCD on a resin printer cooking one corner harder than the others.
• Old FEP film flexing on every layer and lifting fine features.

Fix the mechanicals first. Then dial in settings.

When to mail it in

If you have tried two or three layer heights, retuned retraction, and the faces still come out smeared, the printer probably needs a service rather than another settings tweak. We do mail-in tune-ups and repairs for FDM and resin machines across the UK — belt tension, LCD checks, FEP swaps, extruder calibration, and a test print before it ships back. We can also run a small batch of miniatures for you if you would rather not buy a second printer for the job. Send us a note through /contact.html with the printer model and a photo of a failing print, and we will tell you honestly whether it is a settings problem or a hardware one before you post anything.