The guide
FDM or resin? Let's figure it out.
Both are 3D printing, but they work in completely different ways, and the right choice can make or break a project. Here's everything you need to choose with confidence.
The short answer
Detail? Vat. Durability? Nozzle.
If you only remember one thing: resin wins on detail and surface finish, and FDM wins on strength, size and cost. Everything else is nuance.
- The Vat · Resin
Choose resin when…
- Fine detail matters: faces, textures, tiny text, sharp edges
- You want a smooth surface that's ready to paint
- The part is small, roughly palm-sized or less
- It's a miniature, figurine, jewelry piece or display model
- You need precise small parts or tight-fitting details
- The Nozzle · FDM
Choose FDM when…
- It needs to be strong, tough or take a beating
- The part is big, like helmets, enclosures or long brackets
- It will face heat, sun, moisture or outdoor use
- It needs to flex or bend (TPU) or snap together
- Budget matters, or you want lots of color choices
How it works
The Vat: resin printing
Resin printers (often called SLA or MSLA) hold a shallow vat of liquid photopolymer. A screen beneath it flashes UV light in the exact shape of each layer, curing the resin solid.
The build plate lifts a hair, the next layer cures, and your part is slowly pulled up out of the vat, upside down. Afterward, it's washed in alcohol to remove uncured resin and post-cured under UV light so it's fully hardened and safe to handle.
- Layer height: about 0.025–0.05 mm, finer than a human hair
- Surface: smooth, near-invisible layer lines
- Watch out for: standard resins are more brittle than plastics; small support marks need cleanup
How it works
The Nozzle: FDM printing
FDM (fused deposition modeling) printers feed a spool of plastic filament through a heated nozzle, which draws each layer line by line, like a very precise hot-glue gun.
Layer by layer, the part grows up from the bed. Because FDM uses real thermoplastics such as PLA, PETG, ABS, ASA, nylon and TPU, the parts are tough, functional and available in a huge range of colors and properties.
- Layer height: typically 0.08–0.3 mm
- Surface: visible fine layer lines, a matte or satin finish
- Watch out for: very small details soften; overhangs may need supports
Side by side
The full comparison
Here's how the two stack up on what matters most. An "edge" badge marks the stronger option for that row.
| Factor | The Vat (Resin) | The Nozzle (FDM) |
|---|---|---|
| Detail & resolution | Exceptional. Crisp edges, tiny text and fine textures | Good. Small features soften below ~1 mm |
| Surface finish | Smooth, almost injection-molded look | Visible layer lines (can be sanded or minimized) |
| Strength & toughness | Standard resin is stiff but brittle; tough resins close the gap | Tough and impact resistant, especially PETG, ABS/ASA and nylon |
| Heat & outdoor use | Most resins soften with heat and yellow in sunlight | ASA, ABS and nylon handle heat and UV well |
| Flexibility | Flexible resins exist; limited range | TPU is rubbery, durable and reliable |
| Size | Best for small to medium parts | Large parts, plus easy splitting for even bigger builds |
| Cost | Higher material and post-processing cost per volume | Usually the more economical choice, especially for bigger parts |
| Colors | Mostly neutral tones (gray, white, black, clear); made for painting | Huge range, including silk, matte, glow, wood and more |
| Small-batch speed | Fills a whole plate with minis in the same time as one | Prints parts largely one layer path at a time |
| Best for | Miniatures, figurines, jewelry masters, dental-scale detail, display models | Functional parts, prototypes, cosplay, enclosures, signs, gifts |
Interactive
Which printer is right for you?
Answer as many as you can. The needle moves as you go, and you can bring your answer straight into a quote request.
Real-world examples
Common projects & our usual pick
Every project is a little different, but here's where things usually land.
Tabletop miniatures
Faces, weapons and armor details need resin's resolution. Tough resin helps with handling.
Character busts
Smooth skin and crisp sculpt lines make painting a dream.
Jewelry & rings
Fine filigree and smooth surfaces, plus castable resin for metal casting.
Replacement parts
Real-world toughness in PETG, ABS or nylon at a low cost.
Cosplay helmet
Large and durable, and it sands and paints well. Too big to be economical in resin.
Outdoor mounts
ASA laughs off Alabama sun and summer heat.
Lithophanes & signs
White PLA lithophanes glow beautifully, and signs come in any color.
Phone grips & gaskets
Flexible TPU bends, grips and bounces back.
Prop with fine trim
FDM for the body, resin for the emblems and greebles. The best of both.
Product prototype
FDM for form-and-fit iterations, resin for the polished presentation model.
Materials
What we print with
Choosing a process is half the decision. The material is the other half. Here's a quick look at what each one brings, rated from 1 to 5.
PLA
The everyday hero. Easy to print, crisp, affordable and available in nearly every color and finish. Best for decor, gifts and prototypes.
PETG
Tougher and more heat- and moisture-resistant than PLA, with a little give. A great default for functional parts.
ABS / ASA
Engineering plastics that handle heat. ASA adds UV resistance for outdoor and automotive parts.
TPU
Rubber-like and nearly indestructible. Ideal for grips, bumpers, gaskets, straps and phone cases.
Nylon & CF blends
The heavy hitters. Nylon is tough and wear resistant, and carbon-fiber blends add stiffness for brackets, gears and tooling.
Standard resin
Maximum detail and a silky-smooth finish. The classic choice for display miniatures and models.
ABS-like resin
All the detail with less brittleness. Better for gaming minis that get handled and parts with thin features.
Tough resin
Engineering-grade resin that resists impact and snapping, for precise small functional parts and snap-fits.
Flexible resin
Soft-touch, bendable parts with resin-level detail, for small gaskets, grips and wearable details.
Specialty resins
Clear, castable and high-temperature resins for lenses and light pipes, jewelry casting and heat-exposed parts. Ask what fits your project.
Good to know
Myths & pro tips
"Resin is too fragile."
Standard resin can be brittle, but ABS-like and tough resins hold up to real handling. We'll match the resin to the job.
"FDM can't look good."
With fine layers, smart orientation and the right filament (silk, matte, marble), FDM prints can look stunning.
"I have to pick one."
Nope! Hybrid projects use FDM for big structural parts and resin for the fine details. That's the whole idea behind our name.
Orientation matters
FDM parts are strongest along their layers. Tell us how a part will be loaded and we'll orient it to match.
Food & skin contact
3D prints aren't certified food safe. Fully cured resin is safe to handle, but it isn't meant for food or drink.
When in doubt, ask
Send the file and a sentence about how it'll be used. That's usually all we need to recommend the right setup.
Still on the fence?
Send it over. We'll decide together.
Pick "Not sure" on the quote form and we'll recommend the best process and material for your project, free.