Multicolor 3D Printing Guide: AMS Systems and Alternatives in 2026

A multicolor 3D printing system is, in essence, a mechanism that allows an FDM 3D printer to use several filaments for 3D printing in a single piece to create full-color objects without the need for manual post-processing with paint.

In my experience, it is the most straightforward way to bring complex models to life. You assign the colors in your slicing software, hit print, and the machine handles the material changes automatically. A genuine game-changer that saves you hours of painting.

What exactly is a multicolor system for a 3D printer?

A multicolor 3D printing system is the hardware that enables your filament 3D printer to change color or material mid-print. As Mr Resin, I can assure you that in 2026 there are options for every budget and technical level, making multicolor 3D printing more accessible than ever for the makers community.

The idea is simple: instead of relying on a single spool, the 3D printer has access to several. When the design calls for a color change, the system retracts the current filament, cuts it, sets it aside, and loads the new color into the extruder. This process, known as purging, is repeated until the piece is complete.

I have tried quite a few technologies and each one has its own quirks. The most common ones you will come across are:

• Automatic Material Systems (AMS): Popularized by Bambu Lab. These are external units that manage 4 filaments (and you can chain several together to reach 16). Their strong point is ease of use and seamless integration.
• Multi-Material Units (MMU): Prusa's answer to multicolor printing. It is an add-on you install on their 3D printers that lets you handle up to 5 filaments. That said, be prepared to assemble and calibrate it with patience.
• Dual Extrusion (IDEX): These are the premium 3D printers with two fully independent print heads. Each with its own filament, which is fantastic for printing in two colors or using soluble support materials. And the best part: they barely waste any material.

To give you a quick overview, I have put together this table. At a glance, you will see how each system stacks up.

Let me tell you something: for me, the real game-changer isn't the technology itself, but how incredibly accessible it has become. Before, multicolor 3D printing was a genuine headache. Now, with systems like the AMS, it's almost as easy as pressing a button.

How does a Bambu Lab AMS system work?

A Bambu Lab AMS system works as an automated filament manager that selects, loads, cuts and purges the exact color that the 3D printer needs at any given moment. In my experience, it's the closest thing to plug-and-play magic I've ever seen in multicolor 3D printing.

The AMS is a box where you load up to four spools. Each slot has motorized rollers that push the material through a PTFE tube. When the slicer (Bambu Studio) signals a color change, the system retracts the filament in use, cuts it precisely and loads the new one. All by itself. You can print with up to 16 colors by combining several units. Absolutely mind-blowing! 🤯

The magic behind the curtain

The real trick is the constant communication between the AMS and the 3D printer. If you have the standard AMS (the one for the X1 and P1 series), it uses RFID tags on Bambu Lab spools. When you load a spool, the system scans it and instantly knows what material it is, what color it is and how much is left. No more guessing!

What if you use filaments from other brands? No problem. You simply enter the data manually. Another great feature I've really appreciated is that it works as a humidity-proof enclosure, with space for desiccant bags, keeping your filaments safe.

A tip from Mr Resin: This is especially useful for hygroscopic materials. Your more delicate PLA filaments or TPU will thank you for it.

AMS vs. AMS Lite: which one is for you?

Bambu Lab has two versions. The choice depends on your 3D printer:

• Standard AMS: Enclosed model, compatible with the X1 and P1 series. It's robust, protects the filament and is the only one you can daisy-chain (up to 4 units for 16 colors). It's the professional option.

• AMS Lite: Open, budget-friendly version for the A1 series. The filaments are exposed to the air, so there is no protection against moisture. Its advantage is that it is more accessible.

The decision is straightforward: it comes down to the 3D printer you have. If you are thinking about a new one, I recommend taking a look at our detailed review of the Bambu Lab P2S.

What alternatives exist to the AMS system?

The AMS is not the only way to print in full color; alternatives exist such as MMU units, dual extrusion, or third-party solutions. As your trusted maker colleague, I am here to guide you through this tangle of cables, extruders, and filaments. The choice will depend on your budget and how much you enjoy tinkering.

Multi-Material Units (MMU)

The Prusa MMU is a kit you add to your 3D printer to handle up to 5 filaments with a single extruder. From experience I can tell you that the MMU3 has improved a lot, but it is still a contraption for people who are not afraid to tighten screws and calibrate.

Dual extrusion systems

This is where we enter my preferred category for its efficiency. Having dual extrusion means your 3D printer has two nozzles:

1. Two extruders, one toolhead: Two filaments feed into the same toolhead with two nozzles. It is compact, but getting the height right is key.
2. IDEX (Independent Dual Extruder): The crown jewel! Two completely independent toolheads.

The main advantage of an IDEX system is that you almost completely forget about the purge tower. While one toolhead prints, the other parks itself. This translates into massive material savings and opens the door to using soluble support materials. The downside is that these 3D printers tend to be more expensive.

Third-party solutions such as Palette

The Palette system by Mosaic Manufacturing cuts and splices filaments of different colors to create a single multicolor strand before it reaches the 3D printer. The technology is impressive, but its cost is high and the calibration is incredibly precise.

Although the AMS has simplified the landscape, the competition never sleeps. Other brands such as Creality are promising systems like their CFS. For those of you who already have a good machine and enjoy experimenting, such as the Anycubic Kobra, there are always community projects to add these features. If that is your thing, take a look at our review of the Anycubic Kobra S1 combo.

What is the real cost of each multicolor solution?

The cost of a multicolor solution varies enormously, from around €30 for a specialty filament to more than €700 for a 3D printer with dual extrusion. So you do not get lost, I have put together a comparison table with the most popular systems and their approximate prices in 2026.

As you can see, an AMS is a mid-range investment, while an IDEX 3D printer requires a higher upfront cost, but you save on material in the long run. If you want total control, check out our complete guide to multicolor 3D printing.

What limitations does each multicolor printing system have?

Each multicolor 3D printing system has key limitations in terms of purging, waste, and material compatibility. The AMS and MMU systems generate notable waste due to their purge towers, while IDEX systems minimize it, and multicolor filaments offer no precise color control.

• AMS/MMU Systems: Their main Achilles' heel is the purge tower. Each color change generates a small block of waste plastic. Although it can be optimized by purging into the infill, waste remains a factor to consider. They are also incompatible with highly flexible (TPU) or abrasive filaments without hardened steel nozzles.
• Dual Extrusion (IDEX): Their limitation is the number of colors, normally just two. Although they are incredibly efficient and versatile for using soluble supports, you won't be able to print a rainbow with them.
• Dual/Tricolor Filaments: The limitation is obvious: you have no control over where each color appears. The effect depends on the geometry of the part and the viewing angle. It works wonderfully on curved models, but on flat surfaces the effect is lost. An example I love is the Anycubic PLA Silk Dual Tricolor.

What is the best option based on your budget and level?

The best option depends on whether you prioritize ease of use, enjoy tinkering, or are looking for professional efficiency. For beginners, an AMS is ideal; for tinkering enthusiasts, an MMU; and for efficient support use, an IDEX system. If budget is tight, multicolor filaments are the best entry point.

Here is my direct recommendation based on your profile:

• For the beginner looking for results without drama (Mid-Range Budget): A Bambu Lab AMS system. It's the closest thing to a plug-and-play experience. The initial investment is offset by the peace of mind and reliability from minute one.
• For the maker who loves tinkering (Mid-Range Budget): The Prusa MMU3 is your project. It requires patience and dedication, but the satisfaction of mastering it is priceless.
• For maximum efficiency and professional use (High Budget): An IDEX system. The initial investment is higher, but the long-term savings in material and post-processing time are massive, especially with soluble supports.
• For those who want to try without spending (Low Budget): Don't buy anything! Start with a special filament like the Anycubic PLA Silk Dual Tricolor. For the cost of one spool, you'll discover the world of color without touching a single screw.

FAQ: Frequently asked questions about multicolor 3D printing

Is the AMS compatible with all filaments?

No. It works wonderfully with PLA or PETG, but it is not recommended to use very flexible filaments like TPU due to the risk of jams, nor cardboard spools that sometimes don't grip properly.

How much material is wasted in the purge tower?

Quite a lot. The waste depends on the number of color changes, but modern slicers like Bambu Studio allow purging into the infill, reducing the waste generated.

Is installing an MMU3 kit very difficult?

Yes, it requires patience and technical skill. It is not a plug-and-play system and is designed for makers who enjoy tinkering and calibrating their machine down to the millimeter.

Is multicolor 3D printing much slower?

Yes, absolutely. Each color change adds purge time, meaning a print can end up doubling or even tripling its total duration compared to single-color 3D printing.

Conclusion:

Well, what a journey through the rainbow of 3D printing! I hope that after this overview you have a much clearer idea of which multicolor system appeals to you most. Whether it's the convenience of an AMS, the challenge of an MMU, the efficiency of an IDEX, or the simplicity of a tricolor filament, the important thing is that you have fun and bring your ideas to life in full color. Remember that in 2026, the only limit is your imagination! 😉