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Resin vs FDM 3D Printing: Which Should You Choose?

By Dynafabs

Resin vs FDM 3D printing explained: detail, strength, size and finish compared, so you can pick the right process for miniatures, gifts or working parts.

Resin or FDM: the first choice behind every print

Before we think about colour, infill or layer height, there's a bigger question for any part you order: should it be printed in resin or with FDM (fused deposition modelling, the "melted plastic filament" kind of printing)? Both are excellent, but they're good at very different things. Pick the right one and your part looks better, lasts longer and often costs less.

This guide explains how each process works, where each one shines, and what to tell us so we can steer you the right way. If you're new to filament types, our PLA vs PETG vs ABS/ASA vs TPU guide is a good companion read.

How FDM printing works

An FDM printer pushes a plastic filament through a heated nozzle and draws your part one layer at a time. It's the workhorse of 3D printing, and it's what we use for most functional parts, prototypes, gifts and multicolour prints.

Where FDM shines:

• Tough, practical parts. Brackets, clips, enclosures, jigs and replacement parts in PLA, PETG, ASA or TPU.
• Larger objects. FDM handles bigger parts comfortably and economically.
• Multicolour prints. Our AMS setup can switch filaments mid-print, so logos, signs and figurines can come out in several colours with no painting.
• Strength you can tune. Walls, infill and orientation all let us make a part stronger where it matters.

The trade-offs: you'll usually see fine layer lines, very small details soften, and overhangs need supports or clever orientation.

How resin printing works

A resin printer cures liquid photopolymer with light, one very thin layer at a time. The result is a smooth, highly detailed part, which is why resin is the go-to for miniatures and display pieces.

Where resin shines:

• Fine detail. Faces, chainmail, tiny weapons, textures and engraved text come out crisp.
• Smooth surfaces. Layer lines are far less visible, so there's less sanding before painting.
• Miniatures and figurines. Tabletop armies, D&D characters, busts and collectables.
• Small, intricate models. Jewellery masters, scale model parts and detailed props.

The trade-offs: standard resins are more brittle than tough filaments, so thin parts can snap if dropped or bent. Resin parts need washing, curing and support removal, which leaves small marks to tidy. Very large resin prints get expensive, and most standard resins aren't designed for long periods in direct sunlight.

Quick comparison: which suits which use?

| You want... | Best fit | |---|---| | A miniature or figurine to paint | Resin | | A bracket, clip or functional part | FDM (PETG or ASA) | | Something flexible, like a grip or bumper | FDM (TPU) | | A multicolour sign, keyring or gift | FDM with AMS | | A highly detailed display piece | Resin | | A large prop or enclosure | FDM | | An outdoor part | FDM (ASA or PETG) |

Painting, finishing and miniatures

If the end goal is a painted model, resin usually gives the painter the best canvas. That's why we print a lot of miniatures in resin, and why we team up with Some Miniatures for professional painting. Our picture, print and paint service brings those steps together, and our miniature prep checklist covers what helps a print get ready for paint.

FDM parts can be painted too, especially larger props, but expect a little more sanding and priming to hide the layer lines.

What to tell us when you order

You don't have to choose the process yourself. When you request a quote, a short note helps us recommend the right one:

1. What the part is for: display, gaming, a working part or a gift. 2. Whether fine detail or toughness matters more. 3. Roughly how big it needs to be. 4. Whether it will be painted, handled a lot, or used outdoors.

You can browse our materials and services pages for more on what we offer.

FAQ

Is resin always better quality than FDM? For fine detail and smooth surfaces, usually yes. For strength, flexibility and size, FDM often wins. "Better" depends on the job.

Can a resin miniature survive tabletop gaming? Yes, with normal care. Very thin parts like spears or antennae are the most fragile, so a sturdier base pose helps.

Can I get the same model in both? Often, yes. Some customers print a resin version for display and an FDM version for handling or testing.

Which file types can I send? STL and 3MF are the most common. Our FAQ covers file types and more.

Not sure which process suits your model? Get a quote from Dynafabs, tell us what it's for, and we'll recommend resin or FDM.

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