Bambu Lab P1P vs P1S for Tabletop Terrain

The Bambu Lab P1P and the Bambu Lab P1S are the same printer wearing two different coats. Same chassis, same CoreXY motion system, same Bambu Studio slicer, same build volume, same AMS compatibility. The P1S adds a glass-and-steel enclosure. That is the entirety of the hardware difference, and whether it matters depends entirely on what you are printing and where you are printing it.

For PLA terrain in any room: the P1P. For PETG, PLA-CF, or ABS in a shared workspace: the P1S. Everything else in this article is the detail behind that sentence.

What the two printers share

Understanding what is identical between the two machines saves you from reading a spec comparison that does not tell you anything useful. The P1P and P1S share:

• CoreXY motion architecture, which keeps the print head light and the bed stationary on the vertical axis. This is what gives both machines cleaner taller-piece prints than a bed-slinger at equivalent speeds.
• Build volume of 256 mm on all three axes. For tabletop terrain, this is generous: most modular terrain tiles, ruined walls, and scatter pieces fit comfortably within that envelope.
• Bambu Studio integration. Both machines use the same slicer, the same cloud or LAN mode, and the same profile library. If you know Bambu Studio on one machine, you know it on the other.
• AMS and AMS 2 Pro compatibility. Both printers accept the full AMS unit (not the smaller AMS Lite that ships with the A1). If multicolour terrain is part of your workflow, both machines support it equally. The AMS worth-it question for terrain is the same on either printer.
• Print speed envelope. Both are rated at 500 mm/s and in practice sit closer to 250 mm/s for terrain profiles where quality matters. No meaningful difference here.
• The same Bambu Lab ecosystem considerations: cloud data collection, proprietary parts, and the Apple-of-3D-printing trade-off I covered in the P1P long-term review. These apply equally to both printers.

The spec sheet makes the two look nearly identical because they largely are. The buying decision reduces entirely to the enclosure.

What the enclosure actually does

The P1S’s enclosure traps the heat generated by the heated bed and the hot end. That trapped heat matters for materials that are sensitive to ambient temperature variation during printing.

Three materials benefit meaningfully from an enclosure:

PLA-CF. Carbon-fibre-reinforced PLA is more sensitive to temperature variation than plain PLA. An enclosed chamber reduces the warp risk on larger pieces and helps contain the fine dust that PLA-CF generates during printing. If you are using PLA-CF for terrain bases or stacked storage pieces, the P1S is the more reliable machine.

PETG. PETG warps on cool ambient air. Open-frame printing at room temperature, particularly in winter or in a draughty garage, introduces the temperature variation that causes PETG corners to lift. An enclosure eliminates most of that variable. If heat-resistant terrain for transport-heavy sets or outdoor gaming is part of your workflow, the P1S is the right call.

ABS. The enclosure makes ABS printing sometimes-reliable. ABS is notoriously fume-heavy and should only be run in a well-ventilated space regardless of enclosure. For tabletop terrain that lives indoors, ABS is usually the wrong material entirely; the enclosure does not change that calculus.

The terrain-PLA reality

Here is the thing that Bambu’s marketing does not say clearly: for PLA terrain, the enclosure is useless and can actively work against you.

PLA prints cleanly on an open-frame machine. It does not require a temperature-stable environment to produce reliable first layers, clean walls, and accurate modular tile geometry. The P1P’s open frame is not a weakness for PLA; it is the normal operating condition for the most common terrain material.

More importantly, trapping heat on a long PLA print can cause it to soften mid-way through the print. Many P1S owners who run PLA terrain open the enclosure door for long prints. They are effectively converting their P1S into a P1P for those jobs.

If PLA is the only material in your filament box and the only material you plan to use for the foreseeable future, the P1S’s enclosure is money you do not need to spend.

Noise and the shared workspace

The P1S enclosure does something else: it contains fan and stepper noise. In a home office or a room shared with a working or sleeping partner, this matters. The open-frame P1P at print speed is loud. Belts resonate, fans run at an audible pitch, and the machine emits an electrical hum even when idle. I covered this in the P1P review: noise-cancelling headphones are useful at three metres.

The P1S does not eliminate the noise but it meaningfully reduces what escapes into the room. If the printer is going to run overnight while someone sleeps nearby, or if it shares space with a home office meeting setup, the noise reduction is a genuine quality-of-life argument for the P1S that has nothing to do with materials.

In a garage, a print room, or a dedicated hobby space where noise is not a constraint, this advantage disappears entirely. In that context the P1P is the correct pick on price alone.

Chamber light and other cosmetic differences

The P1S adds a chamber LED that illuminates the print in progress. It also has a slightly updated touchscreen interface compared to the P1P’s older monochrome non-touch screen.

The chamber LED is nice for checking on a print without opening the enclosure. It is not a buying reason.

The screen improvement is modest. Both the P1P and P1S screens are inferior to what you would expect on a machine at this price point, and both are mostly bypassed by using Bambu Studio on a phone or computer for daily operation.

Neither difference belongs in a buying decision.

The price gap in 2026

At 2026 prices, the P1S costs roughly 25% to 35% more than the P1P. The P1P is now out of its primary market lifecycle: it is no longer the newest machine in the line and is harder to find at full retail. A discounted P1P is a defensible buy for a PLA terrain hobbyist. A P1S at standard retail earns its premium only if the enclosure is working for your specific materials.

Bambu sometimes bundles the AMS 2 Pro with the P1S at a price that reduces the effective cost of adding multicolour capability. If multicolour terrain is on the roadmap, check current bundles before buying printer and AMS separately.

For context on how these two sit relative to the entry-level A1 and the Elegoo Centauri Carbon at a similar price, the three-way Bambu comparison and the Centauri Carbon vs A1 comparison cover those decisions in detail.

The Centauri Carbon in this price bracket

At P1S prices, the Elegoo Centauri Carbon is a direct competitor. It is an enclosed CoreXY machine with a larger build volume than either Bambu printer (300 mm cubed against 256 mm cubed) at a price closer to the P1P than the P1S.

If build volume is the deciding factor and you are not committed to the Bambu ecosystem, the Centauri Carbon vs A1 article covers that comparison in full. The Centauri Carbon is a real alternative that is worth examining before committing to the P1S on brand loyalty alone.

The verdict for terrain

PLA-only hobbyist, any workspace: P1P. The enclosure adds nothing for PLA and the price difference is real money.

Multi-material hobbyist (PETG, PLA-CF, occasional ABS): P1S. The enclosure earns its cost on the materials that need it.

Shared-room printing, noise is a constraint: P1S. The noise reduction is a genuine argument independent of materials.

Garage or dedicated print room: P1P. No noise constraint, no shared-room consideration. Spend the saving on filament.

Budget-constrained, only PLA, found a discounted P1P: P1P. The machine that converted me to FDM printing remains capable at a discount. The full long-term review covers what year-plus of terrain printing on it actually looked like.

Closing

Same core machine, two enclosure options. The right pick is the one that matches your filaments and your room. The P1S is a better machine in absolute terms; it is not a better machine for every buyer. A PLA terrain hobbyist who spends the P1S premium on nothing they will use has made a worse buying decision than one who put that money into filament and a second print plate.

For the broader terrain printer landscape, the best 3D printer for terrain guide covers the full field including the slicer settings that determine whether any of these machines actually produce good terrain output. The slicer matters as much as the hardware. The FDM slicer settings guide for tabletop terrain is the companion read once you have made the hardware decision.