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I own an Elegoo Saturn and an Elegoo Neptune 2S. They sit on the same shelf in my basement, and I use both, but not for the same job. When I need a squad of 28mm characters for the table, I reach for the Saturn every time. When I need a terrain base, a dice tower, or a filament-cheap organizer bin, the Neptune comes off the shelf instead. That split isn’t a theory I read somewhere. It’s what running one of each machine actually taught me, and it’s the short version of the resin printer buying guide I’d point you to if you only wanted the printer recommendation and none of the reasoning.
Here’s the reasoning anyway, because “resin printer vs FDM for miniatures” is a real question with a real answer, not a coin flip. For character-scale miniatures, resin isn’t a marginal step up from FDM. It’s a different category of output. FDM still has a legitimate place in a hobbyist’s shop, just not the place most people assume when they’re shopping for their first printer. This article covers both sides honestly: where resin wins outright, where FDM earns its keep, and which machine to actually buy if minis are the goal.
What Each Technology Actually Is
Resin printing for miniatures almost always means MSLA: Masked Stereolithography Apparatus. A UV screen sits under a vat of liquid resin and flashes an image of the entire layer at once, curing it against the build plate in a few seconds. The printer lifts the plate, the vat settles, and the next layer cures. It’s a light-based process, and the resolution is set by the screen’s pixel pitch, not by anything physically moving through space.
FDM (Fused Deposition Modeling) is the printer type most people picture when they hear “3D printer”: a nozzle melts filament and lays it down as a physical bead, layer by layer, while motors move the nozzle or bed in X, Y, and Z. My Neptune 2S runs a 0.4mm nozzle, which is the standard size on almost every consumer FDM printer, Bambu and Prusa included. The bead width and the nozzle diameter set a hard floor on how fine a detail the machine can physically extrude. There’s no software setting that gets around that floor.
The Resolution Reality on a 28mm Face
This is where the decision actually gets made, so let’s get specific instead of hand-wavy. My Saturn prints at 50µm XY resolution, fixed by its 4K mono LCD. My Neptune, on a well-tuned 0.4mm nozzle at a 0.12mm layer height (about as fine as it’s practical to run FDM without printing overnight), is laying down beads roughly 400µm wide and 120µm tall per layer.
Put those numbers next to a 28mm miniature’s face. The eyes, the nose bridge, the individual strands the sculptor built into the hair, the stitching on a cloak: these details are a few hundred microns to begin with, sometimes smaller. A resin printer working at 50µm still has roughly eight times the addressable resolution FDM has at its finest practical setting, and the higher-resolution 4K and mono LCDs common on newer machines push that gap even further. FDM doesn’t get close. It doesn’t get in the neighborhood. You can see individual layer lines on an FDM miniature’s face with the naked eye at arm’s length. You need a loupe to find them on a resin print.
I’ve printed the same free STL on both machines just to see it side by side. The Neptune version is recognizably a goblin. The Saturn version has teeth, individual knuckles, and a belt buckle you can read.
None of this is a knock on FDM as a printer category. It’s a statement about what the process can physically resolve at 28mm scale. A $2,000 FDM printer with a 0.4mm nozzle still has a 0.4mm nozzle.
Resin vs. FDM for Miniatures, Side by Side
| Category | Resin (MSLA) | FDM |
|---|---|---|
| XY resolution / 28mm detail | 18--72µm depending on printer; facial features and fine trim render cleanly | ~400µm bead width at best practical settings; facial features round off into blobs |
| Visible layer lines | Effectively invisible at 28--32mm scale | Visible at arm’s length on curved surfaces |
| Speed for a squad of 5 | 1.5--2.5 hours for a full plate of 5--8 minis | 3--5 hours printed individually to match the same squad |
| Consumables + cleanup | IPA wash, UV cure, vat/FEP maintenance, gloves every session | Spool swaps, occasional nozzle clean, bed adhesion prep |
| Safety / fumes | Skin irritant and sensitizer uncured; gloves and ventilation required | No chemical exposure with PLA; ABS/ASA need ventilation |
| Cost per model (minis) | $0.30--$0.60 in resin | $0.05--$0.15 in filament, but the result isn’t usable as a character mini |
| Best use case | Character models, NPCs, display pieces, anything with a face | Terrain, dice towers, organizers, large display pieces without fine detail |
Where FDM Actually Wins
None of this makes FDM a bad printer to own. I wouldn’t run terrain on my Saturn even if the build plate were big enough, because it would be a genuinely bad way to spend resin.
Cost per gram, not per model. A spool of PLA runs $18--$25/kg. A liter of standard resin runs $25--$35 and weighs about 1.1kg cured, but you lose more of it to supports, rafts, and failed prints than FDM loses to a failed brim. For anything printed by weight (a dungeon’s worth of wall tiles, a stack of dice trays, storage bins), FDM is dramatically cheaper.
No fumes, no gloves, no wash station. My Neptune sits on the same shelf as a stack of LEGO storage bins, and nobody has to be told to keep their hands off it. My Saturn has a dedicated wash-and-cure station, a box of nitrile gloves, and an uncured-resin-stays-off-limits rule. If you’re printing in a shared space, or you’d rather skip dealing with IPA disposal and a skin sensitizer entirely, that’s a real point in FDM’s favor, not a minor one.
Big pieces don’t need fine resolution. A 12-inch dungeon wall section or a tavern building doesn’t benefit from 18µm resolution the way a face does. Nobody’s inspecting a wall panel under a loupe. FDM’s coarser layers disappear at that scale, especially once it’s primed and painted.
Build volume that scales affordably. My Neptune’s bed is bigger than my Saturn’s vat by a wide margin, and FDM printers scale to genuinely large build volumes without the price climbing as fast as resin does. If you want a full terrain table, FDM gets you there without stitching together a dozen small resin plates.
The Cost, Mess, and Safety Trade-off
Buying a resin printer means signing up for a process, not just a purchase. Every session on the Saturn involves gloves, an IPA wash, a UV cure step, and disposal of spent resin and used paper towels: cured resin waste, never poured down a drain. The Neptune, by comparison, is closer to appliance-simple. Load filament, hit print, pull the part off, trim a little stringing.
That process overhead is the honest cost of resin’s resolution advantage. It’s worth paying for miniatures because the resolution is the entire reason you bought the machine. It’s not worth paying for a filament dry box or a garden stake, which is why I don’t print those on the Saturn even though I technically could.
The Recommendation: Which Resin Printer to Actually Buy
If minis are the goal, buy resin. That’s not a hedge, it’s the verdict this whole article has been building toward. FDM is a genuinely useful second machine for terrain and shop tools, but it isn’t a substitute for resin on a 28mm character model, and no amount of tuning closes that gap.
For a first resin printer, I’d point you at one of two machines depending on budget. The Elegoo Mars 4 Ultra is the cheaper entry point and still prints real detail, down to 18--24µm on some units. If you want a bit more resolution headroom without stepping up to a full flagship, the Anycubic Photon Mono 10K is the other budget pick I’d trust for a first machine. The full case for both, plus everything you need alongside them, is in the budget resin printer guide.
If you’ve got the budget and you print often enough that build plate size and speed start to matter, the Elegoo Saturn 4 Ultra is the printer I’d point you at. It’s not the cheapest way into resin, but the plate size and speed both genuinely change how much you get done in an evening compared to cheaper alternatives.
Whichever one you buy, don’t skip the process. A resin printer without a wash-and-cure routine and basic safety gear isn’t ready to run, and if you’ve never handled uncured resin before, the beginner’s guide to resin printing miniatures walks through the full workflow before you open your first bottle.
Keep the FDM printer too, if you have one or plan to get one. Just keep it on terrain and organizers, and let the resin printer handle the faces.
Quick Answers
Can I get away with just FDM if I’m on a tight budget? You can print miniature-shaped objects on FDM, and some hobbyists genuinely play with them at the table. But you’re trading away facial detail, fine weapon geometry, and clean edges on anything under 30mm. If the budget only stretches to one printer and minis are the priority, a sub-$200 resin printer like the Mars 4 Ultra beats a $300 FDM printer on the thing you actually care about.
Does a bigger nozzle or finer FDM settings ever close the gap? Not meaningfully. Dropping to a 0.2mm nozzle helps a little but slows printing dramatically and still can’t match resin’s screen-based resolution. The physical bead is still an order of magnitude larger than what a resin printer’s UV screen can resolve. This is a process limitation, not a tuning problem.
Is it worth owning both, like I do? If you print minis regularly and also want terrain, storage solutions, or shop jigs, yes. They’re solving different problems and neither one does the other’s job well. If you only print character models and never touch terrain, skip FDM entirely and put that budget toward resin, a wash-and-cure station, and a decent bottle of ABS-like resin instead.