Bambu Studio support settings are one of the most misunderstood aspects of the slicer — and one of the most impactful. Get them wrong and you’re left with a failed print, a surface that looks like it lost a fight, or supports that won’t come off without destroying the model. Get them right and your printer handles complex overhangs cleanly, your surface quality improves dramatically, and support removal takes seconds instead of minutes.
The good news is that Bambu Studio has one of the most capable support generation systems available at the consumer level. Tree supports, automatic overhang detection, support painting for manual control, and a full suite of advanced interface settings give you precise control over exactly where supports go, how they attach, and how cleanly they release. Most beginners never dig past the “Enable support” checkbox — this guide covers everything beyond it.
This article is the second in the Dialing In 3D Bambu Studio series. If you haven’t read the Bambu Studio Beginner’s Guide yet, start there — it covers the full interface, workflow, and first print process that this article builds on. This guide assumes you’re comfortable with the basics and ready to go deeper on one of the most critical areas of print preparation.
We’ll cover every Bambu Studio support setting — what it does, when to use it, and what happens when you get it wrong. By the end, supports will be one of the least stressful parts of your print preparation workflow.
What Are Supports and Why Do You Need Them?
FDM 3D printers build objects layer by layer from the bottom up. Each layer is deposited on top of the previous one — which works perfectly for vertical walls, flat surfaces, and gradual curves. The problem arises with overhangs: areas where the model extends horizontally into space without anything below them to print on.
Most FDM printers can handle overhangs up to about 45–50 degrees from vertical without additional support. Beyond that angle, the extruded filament has too little contact with the layer below it to bond properly — it sags, droops, or collapses mid-air. Steep overhangs, horizontal bridges, and features that extend far from the main body of the model all commonly require supports.
Supports are temporary structures that Bambu Studio generates beneath these problem areas. They print alongside your model, providing a surface for overhanging sections to build on, and are removed after printing is complete. Done well, supports are barely noticeable on the final print. Done poorly, they leave rough surface marks, break off in pieces, or refuse to come off without damaging the model.
Understanding Bambu Studio support settings is the difference between those two outcomes
How Bambu Studio Generates Supports Automatically
When you enable supports in Bambu Studio, the slicer analyzes your model geometry and identifies all areas that overhang beyond the threshold angle you’ve set. It then generates support structures beneath those areas automatically — no manual identification required.
This automatic detection is genuinely capable for most models. Bambu Studio’s overhang analysis correctly identifies the vast majority of problem areas, and the default tree support algorithm generates structures that are efficient, clean, and reasonably easy to remove. For straightforward models — figurines, household objects, mechanical parts — automatic support generation is often all you need.
Where automatic generation falls short is on complex models with geometry that benefits from human judgment. A model with internal cavities, delicate surface features, or areas where you specifically don’t want supports (to preserve a surface texture, for example) requires manual override. That’s where support painting comes in — covered in detail below.
The workflow is: enable supports, slice, check the layer preview to verify support placement, adjust settings or paint as needed, reslice, and verify again before printing. Never send a support-heavy print without checking the layer preview first.
Tree Supports vs Normal Supports — Which Should You Use?
Bambu Studio support settings offer two fundamental support types, and choosing between them is the first decision you’ll make after enabling supports. Understanding what each one does changes how you approach every model that needs support.
Normal Supports
Normal supports (also called rectilinear or linear supports) build straight vertical columns from the build plate up to the overhanging section. They’re simple, fast to generate, and predictable — the same dense grid structure everywhere, regardless of model geometry.
The downsides are real. Normal supports use more material than tree supports. They’re harder to remove because they have more contact with the model surface. And because they build vertically from the plate, they can’t reach inside complex model geometry without filling large areas with support material — which wastes filament and creates more surface marks to clean up.
Normal supports are best for: simple models with straightforward overhangs, prints where you need maximum support stability (large flat overhangs, very steep angles), and situations where tree support generation is slow or produces unstable structures on a specific model.
Tree Supports
Tree supports use an organic branching algorithm to grow support structures up from the build plate, touching the model only at the specific points where support is needed. The result looks like a tree — a trunk at the base branching into progressively finer structures that contact the model at minimal points.
Tree supports use significantly less material than normal supports. They’re easier to remove because they have minimal contact area with the model surface. And because they approach the model from angles rather than straight up, they can reach areas that normal supports can’t without filling the space with dense support material.
The tradeoff is computation time — tree support generation takes longer than normal support generation, especially on complex models. And for very large flat overhangs, tree supports can sometimes be less stable than a solid normal support structure.
Tree supports are best for: the majority of models you’ll print. Figurines, organic shapes, models with internal geometry, anything where support removal surface quality matters, and most functional parts with standard overhang angles. Bambu Studio defaults to tree(auto) for good reason — it’s the right choice most of the time.
The Auto Setting
Bambu Studio’s default is tree(auto) — the slicer analyzes each model and decides where tree supports are appropriate and where normal supports would be more effective, applying each type to different areas of the same model based on geometry. For most users, leaving the type on tree(auto) and only switching to a specific type when results are unsatisfactory is the right approach.
The Support Tab — Every Setting Explained
The Support tab is where all core Bambu Studio support settings live in the Process panel. Here’s every setting you’ll encounter, explained clearly:
Enable Support
The master toggle. Off by default — you need to check this box to generate any supports. Enabling support doesn’t mean every overhang gets a support structure; it means Bambu Studio will analyze your model and generate supports where the threshold angle is exceeded. Models with no overhangs beyond your threshold angle will generate no supports even with this enabled.
A common beginner mistake: enabling support for every print by habit. Many models — especially those designed for 3D printing — are oriented to minimize or eliminate overhangs intentionally. Always check your layer preview after slicing before assuming you need supports.
Type
Selects between tree(auto), tree, and normal support types. As covered above, tree(auto) is the right default for most prints. Switch to normal specifically when you have large flat overhangs that need maximum stability, or when tree support generation is producing unstable or inadequate structures on a specific model geometry.
Style
Controls the visual style of tree support branches. Options include Default, Organic, and Hybrid. Default produces the standard branching structure. Organic produces more curved, flowing branches that are often easier to remove and leave cleaner surface marks. For most prints, Default works well — try Organic when support removal is leaving more surface marks than you’d like.
Threshold Angle
This is the single most important support setting for beginners to understand. The threshold angle defines the minimum overhang angle at which Bambu Studio generates supports. The default is 30 degrees.
What does 30 degrees mean in practice? Bambu Studio measures overhang angle from the horizontal (not the vertical). A 0-degree overhang is perfectly horizontal — a bridge extending straight out from the model with nothing below it. A 90-degree overhang is perfectly vertical — a straight wall with no overhang at all. The threshold angle setting determines where in that range Bambu Studio starts generating supports.
At the default 30 degrees, Bambu Studio generates supports for overhangs steeper than 30 degrees from horizontal — which means overhangs that are fairly aggressive. Most printers can handle 45-degree overhangs without supports, and many handle steeper angles cleanly depending on print speed and cooling. The 30-degree default is conservative — it generates supports in places your printer might actually handle without them.
Adjusting the threshold angle: if your prints are generating supports in areas that don’t need them, increase the threshold angle to 40–45 degrees. If you’re seeing surface quality issues on moderate overhangs that aren’t getting supports, decrease it to 20–25 degrees. The right value depends on your specific printer’s overhang capability and the cooling performance on a given model.
The best way to find your printer’s actual overhang capability: print an overhang test model (widely available on Makerworld) without supports and observe which angles produce acceptable results. Set your threshold angle just below that point.
On Build Plate Only
When enabled, this setting restricts support generation to structures that originate from the build plate rather than from the model surface. This is one of the most useful settings for intermediate users and one of the least understood by beginners.
Here’s the problem it solves: on complex models, Bambu Studio sometimes generates supports that build on top of other model surfaces rather than reaching all the way down to the build plate. These surface-to-surface supports are often harder to remove and leave more surface marks than plate-originating supports. Enabling “On build plate only” forces all supports to grow from the plate, which typically produces cleaner removal.
The tradeoff: some overhangs deep inside a model’s geometry genuinely can’t be reached by plate-originating supports. Enabling this setting may leave some internal overhangs unsupported. Check your layer preview carefully after enabling this setting to confirm all critical overhangs are still covered.
Support Critical Regions Only
When enabled, Bambu Studio restricts support generation to critical overhang regions only — areas where print failure is most likely — rather than generating supports for every area beyond the threshold angle. A useful setting for reducing support material on models where some unsupported overhangs are acceptable. Leave unchecked for most prints unless you’re specifically trying to minimize support usage on a model with many moderate overhangs.
Remove Small Overhangs
Checked by default. This setting tells Bambu Studio to skip generating supports for very small overhang areas that the printer can likely handle without assistance. Leaving this enabled is correct for most prints — it reduces unnecessary support material on minor details that don’t need it. Uncheck it only if you’re seeing small overhangs failing on a specific model and the default isn’t generating supports for them.
Advanced Support Settings
The advanced Bambu Studio support settings significantly affect support quality and removal ease. These are the settings most beginners never touch — but understanding them is what separates clean support removal from frustrating tearoff sessions.
Top Z Distance
The vertical gap between the top of the support structure and the bottom of the overhanging model surface. The default is 0.1mm.
This gap is critical. Too small and the support fuses to the model, making removal difficult or impossible without damaging the surface. Too large and the overhang surface has too little support below it, leading to surface drooping and quality issues.
The 0.1mm default is aggressive — it produces excellent supported surface quality but can make removal harder on some materials. If you’re finding supports difficult to remove and leaving marks, try increasing to 0.2mm. If overhanging surfaces are drooping despite supports, leave at 0.1mm or decrease slightly. ABS and engineering filaments may benefit from slightly different values due to material shrinkage characteristics.
Bottom Z Distance
The vertical gap between the build plate surface (or model surface when supports build on the model) and the bottom of the support structure. Default is 0.2mm.
For supports originating from the build plate, this setting primarily affects how easily the support base releases from the plate after printing. For supports building on model surfaces, it affects how cleanly they release from the surface below them. The 0.2mm default works well for most situations.
Top Interface Layers
The number of densely-printed layers at the top of the support structure, immediately below the overhanging model surface. Default is 3 layers.
Interface layers are one of the most impactful advanced settings. A standard support structure is relatively sparse — it doesn’t need to be dense throughout because its job is just structural. But the very top of the support, where it contacts your model, needs a smooth, even surface to support the overhanging layers properly. Interface layers provide that smooth surface.
Three layers is the default — this produces excellent surface quality on supported areas. Reduce to 2 if support removal is proving difficult, or increase to 4 for maximum surface quality on critical overhangs. Fewer interface layers (1) use less material and release more easily but may leave a rougher surface on supported areas.
Bottom Interface Layers
The same concept applied to the bottom of the support structure, where it contacts the build plate or model surface it’s resting on. Default is 2 layers. This primarily affects how cleanly supports release from their base rather than the quality of the supported model surface.
Support/Object XY Distance
The horizontal gap between the support structure and the model’s side walls. Default is 0.35mm.
This setting prevents supports from fusing to the sides of your model. Too small and supports bond to vertical walls, making side removal difficult. Too large and supports don’t reach close enough to properly support overhangs that originate near vertical walls. The 0.35mm default handles most situations correctly — increase slightly if you’re finding supports bonded to wall surfaces on a specific model.
Support Interfaces — What They Are and When to Enable Them
Support interfaces deserve special attention because they’re the single biggest lever for improving supported surface quality in Bambu Studio.
A standard support structure is printed with relatively sparse infill — efficient but rough on the surface. When your model’s overhanging layers print on top of this rough surface, they don’t have a stable, even base to bond to, and the result is a rough, droopy underside on the supported area. Interface layers solve this by printing a dense, smooth cap on top of the support structure immediately before the model layers above.
You control interface layers through the Top Interface Layers and Bottom Interface Layers settings described above. But there’s an additional consideration: interface material.
Filament for Supports — Interface Material
In the Support tab, you’ll find a “Filament for Supports” section with two dropdowns: Support/raft base and Support/raft interface. Both default to the same filament as your model material.
For single-color printing this doesn’t matter — you only have one filament. But for multi-color setups or printers with dual extruders (like the Bambu Lab H2C), you can assign a different filament specifically for support interfaces. The most powerful application of this: assigning a water-soluble filament (PVA) to support interfaces on the H2C’s dual extruder system, producing supports that literally dissolve in water and leave zero surface marks.
Even without soluble supports, assigning a different color to support interfaces can make identification and removal significantly easier — the visual contrast between support and model material makes it obvious where to start removing. This is a quality-of-life trick that costs nothing on a multi-color setup.
Support Painting — Manual Control Over Every Support
Automatic support generation handles the majority of models correctly — but there are always situations where you want more precise control. Support Painting is the tool for that.
Access Support Painting from the build plate toolbar — it’s the brush icon labeled “Supports Painting [L]”. Your model must be selected first. Once active, the model turns grey and a floating panel appears showing Tool type icons, Pen size, Highlight overhang areas, Section view slider, and an Erase all painting button.
How Support Painting Works
Support Painting uses two mouse buttons to paint two different types of areas directly onto the model surface:
Left click — Enforce (purple): Paint an area purple to force Bambu Studio to generate supports there regardless of the threshold angle setting. Use this when a specific area needs support but falls just below your threshold angle, when automatic generation missed a problem area, or when you want to add support to one specific feature without changing the global threshold angle for the entire model.
Right click — Block (red): Paint an area red to prevent Bambu Studio from generating supports there regardless of the overhang angle. Use this when automatic generation is placing supports on a surface you want to keep clean, when supports are generating inside a cavity where they’d be impossible to remove, or when you want to preserve a specific texture or surface detail that supports would damage.
Tool Type Icons
The four icons at the top of the Support Painting panel control how you paint:
Circle brush: Standard sphere brush — paints a circular area on the model surface. Adjust size with the Pen size slider. Good for painting broad areas quickly.
Minus/Erase: Erases previously painted areas. Use this to undo specific painted regions without clearing all painting.
Paint bucket: Fills a connected surface region in one click. The most efficient tool for painting entire faces — reaches for this first when you want to enforce or block an entire face of the model.
Dotted selection: Selection-based painting for precise geometric regions.
Additional Panel Options
On overhangs only: When checked, painting is restricted to overhang areas — useful for quickly enforcing support on all overhangs of a specific surface without painting non-overhang areas.
Highlight overhang areas: Adjusts the threshold angle for overhang highlighting in the painting view, helping you visualize which areas are being detected as overhangs at your current settings.
Section view: Clips the model at a specific Z height so you can paint internal surfaces that would otherwise be hidden from view.
Erase all painting: Removes all painted enforcement and blocking in one click — useful when you want to start your support painting from scratch.
Combining Auto Generation with Support Painting
The most powerful workflow: enable automatic support generation for the majority of the model, then use Support Painting to add purple enforced areas where auto generation missed and red blocked areas where it generated unnecessary supports. This hybrid approach gives you the efficiency of automatic generation with the precision of manual control.
Workflow: enable supports → slice → check layer preview → use Support Painting to adjust problem areas → reslice → verify → print.
Raft Settings
Directly below the support settings in the Support tab is the Raft section. A raft is a flat base structure printed beneath your entire model — it improves bed adhesion for models with small footprints or difficult-to-adhere materials and can reduce warping on ABS prints.
The default is 0 raft layers (no raft). For most prints on a properly calibrated printer with a clean build surface, no raft is needed. Enable a raft (typically 2–3 layers) when:
- You’re printing a model with a very small contact area on the build plate and bed adhesion is failing
- You’re printing ABS on a printer with less-than-ideal enclosure temperature consistency
- The model has no flat base and won’t sit stably on the plate during printing
Rafts add print time and material waste, and require removal after printing. For bed adhesion issues, a brim (configured in the Others tab) is usually a better solution than a raft — it adds adhesion surface area with less material overhead and is generally easier to remove.
How to Remove Supports Cleanly
The best support settings in the world don’t help if you remove supports incorrectly. Clean removal technique matters as much as clean generation.
Remove supports while the print is still warm. Supports release most easily when the part is slightly warm — fresh off the printer, before it fully cools to room temperature. The material is slightly more flexible and the support interface gap hasn’t fully set. For PLA, this means removing supports within 5–10 minutes of the print completing. For ABS and PETG, the window is similar.
Use flush cutters to find the starting point. Don’t grab a support structure and pull directly — that’s how you damage model surfaces. Instead, use flush cutters (flush wire cutters, available at any hardware store and essential in any 3D printing toolkit) to clip the support structure near its base, freeing it from the model. Once the base is disconnected, the structure usually peels away from the model surface cleanly.
Work parallel to the surface, not perpendicular. When peeling or pulling supports away from a model surface, apply force parallel to the surface rather than pulling straight away from it. Lateral force separates the interface layer along the Z-distance gap rather than pulling the model surface with it.
Use a dental pick or hobby knife for tight areas. Small support structures in confined spaces require precision tools. A dental pick or pointed hobby knife lets you get underneath a support structure and lever it away without applying force to the surrounding model surface.
If supports won’t come off cleanly, adjust Z-distance. Supports that fuse to the model or leave large surface marks almost always indicate a Z-distance that’s too small. Increase Top Z Distance to 0.25–0.3mm and reslice before the next attempt.
Common Support Problems and Fixes
For a full breakdown of print quality issues beyond supports, see our 3D Printing Troubleshooting Guide. For support-specific problems, here are the most common issues and their fixes:
Supports won’t come off / leave large marks: Top Z Distance is too small. Increase to 0.25mm. Also check that you’re removing supports while the print is still warm.
Overhanging surfaces are drooping despite supports: Top Z Distance may be too large, or interface layers are too few. Decrease Z Distance to 0.15mm and increase Top Interface Layers to 3. Also check that your threshold angle is set low enough to generate supports for the problem area.
Supports are generating where I don’t want them: Use Support Painting blockers to prevent support generation on specific surfaces. Alternatively, increase the threshold angle to reduce overall support generation.
Supports are missing from areas that need them: Use Support Painting enforcers to force support generation on specific areas. Alternatively, decrease the threshold angle or disable “Remove small overhangs.”
Tree supports are collapsing during printing: Switch to normal supports for the problematic model, or try the Hybrid style option under tree supports. Increasing the support wall count (in Advanced settings) also improves tree support stability.
Supports are taking forever to generate: Tree support generation on complex models can be slow. Switch to normal supports if speed is a priority. Reducing model complexity or splitting the model into parts can also reduce generation time.
Supports are using too much material: Reduce sparse infill density in the support advanced settings, or switch from normal to tree supports if you’re using normal. Enable “Purge into support” in the Others tab for multi-color prints to reduce purge waste. Also check whether your threshold angle is generating supports for overhangs your printer can actually handle without them — a test print can calibrate your expectations.
Support Settings by Material
Different filament materials behave differently during support generation and removal. Here’s what to adjust for each common material:
PLA: Default settings work well. Top Z Distance 0.2mm, Top Interface Layers 2, tree(auto). PLA supports remove cleanly at default settings on most models. PLA-printed supports on PLA models release at the interface layer predictably.
PETG: PETG is stickier than PLA and bonds more aggressively to support interfaces. Increase Top Z Distance to 0.25mm and consider reducing interface layers to 1 for easier removal. PETG supports on PETG models are notoriously difficult — if surface quality under supports is critical, consider printing PETG model with PLA support material if your setup allows it. For more on PETG behavior, see our Best PETG Filament guide.
ABS: ABS shrinks as it cools, which can cause supports to bond more tightly than expected. Increase Top Z Distance slightly (0.25mm) and ensure you’re removing supports while the part is still warm from the enclosed chamber. The enclosed environment of the Bambu Lab P1S or H2C maintains ideal removal conditions. See our Best ABS Filament guide for more on ABS print settings.
TPU: Flexible filaments are notoriously difficult to support — the flexible model material and the support material both flex, making clean separation at the interface challenging. Increase Top Z Distance to 0.3mm and use minimal interface layers (1). Where possible, reorient TPU models to eliminate overhangs entirely rather than relying on supports.
Practical Tips for Better Support Results
Always check the layer preview before printing. This applies to every print but is especially critical for support-heavy models. Scrub through the layer preview after slicing to verify supports are generating in the right places, the Prime Tower is correctly positioned, and no support structures are generating inside enclosed spaces where they can’t be removed. This two-minute check prevents hours of failed print cleanup.
Consider model orientation before adding supports. The best support strategy is often reorienting the model to minimize overhangs. A model printed on its side may need no supports at all compared to printing it upright. Before enabling supports, rotate your model in Bambu Studio and evaluate whether a different orientation reduces or eliminates the need for them. The “Auto Orient” function in the build plate toolbar is a good first step — it finds the orientation with minimum overhang area automatically.
Split models to eliminate supports. Some models have geometry that requires extensive supports in any orientation. The Cut tool in Bambu Studio’s build plate toolbar lets you split a model into two pieces, print each flat-face-down, and glue them together after printing. This is often faster and produces better surface quality than printing with dense supports. Models designed for 3D printing on Makerworld are often pre-split specifically to eliminate supports.
Use the right support for the right model. Don’t default to tree supports for every model just because they’re the default. A model with a large flat horizontal overhang — like the brim of a hat — may produce better results with normal supports that provide consistent contact across the entire surface. Evaluate each model on its geometry rather than applying a one-size-fits-all approach.
Dial in your settings with a test model. Print a dedicated support test model (available on Makerworld) with your current settings before committing those settings to a long, complex print. The test print lets you evaluate Z-distance, interface quality, and removal ease in a few minutes rather than discovering problems after a multi-hour print.
Dry your filament before support-heavy prints. Moisture-contaminated filament produces inconsistent extrusion that makes support interfaces rough and increases bonding between supports and the model. A pre-print dry cycle on your filament — especially PETG and ABS — significantly improves support surface quality and removal ease. See our Best Filament Dryers guide for the right dryer setup.
What’s Next in the Bambu Studio Series
This guide covers supports in depth — but the Bambu Studio series has significantly more to explore. Coming next in the Dialing In 3D Bambu Studio series:
- Bambu Studio Filament Profiles — Complete Guide — how to create, tune, and save custom profiles for any material
- Bambu Studio vs. Orca Slicer — which slicer is right for your workflow and when to make the switch
- Bambu Studio Multi-Color Printing Guide — the complete AMS setup, Prime Tower optimization, and Color Painting workflow
For video content covering Bambu Studio workflows and real-world printing, follow the Dialing In 3D YouTube channel at youtube.com/@DialingIn3D.
Final Thoughts
Bambu Studio support settings reward the time you spend learning them. The gap between a beginner who leaves everything on default and an intermediate user who understands threshold angles, interface layers, Z-distance, and support painting is enormous — and it shows directly in print quality and the time spent removing supports after every print.
Start with tree(auto), check your layer preview, and adjust from there. Most prints only need small tweaks from the default Bambu Studio support settings. As you encounter specific problems — supports that won’t come off, surfaces that droop despite supports, supports generating in the wrong places — the settings in this guide give you the precise controls to fix each one.
If you’re still building your foundation in Bambu Studio, revisit the Bambu Studio Beginner’s Guide for the full interface and workflow overview. And if you’re running into print quality issues that go beyond supports, our 3D Printing Troubleshooting Guide covers every common FDM failure mode with step-by-step fixes.
Frequently Asked Questions
How do I enable supports in Bambu Studio?
Open the Process panel in the left sidebar, click the Support tab, and check the “Enable support” checkbox. Bambu Studio will automatically generate supports based on your threshold angle and support type settings when you slice the model. Always check the layer preview after slicing to verify support placement before printing.
What is the best support type in Bambu Studio?
Tree(auto) is the best default support type for most models. It uses Bambu Studio’s automatic analysis to apply tree supports where appropriate and normal supports where they’d perform better, without requiring manual selection. Switch to normal supports specifically for large flat overhangs where tree support stability is insufficient, or to tree (non-auto) when you want consistent tree support behavior across the entire model.
What threshold angle should I use in Bambu Studio?
The default threshold angle of 30 degrees works well for most models and printers. If supports are generating in areas your printer handles without them, increase to 40–45 degrees. If overhangs below the default threshold are producing surface quality issues, decrease to 20–25 degrees. Print an overhang test model to calibrate the right value for your specific printer.
How do I remove supports from a Bambu Studio print?
Remove supports while the print is still warm — within 5–10 minutes of completion. Use flush cutters to clip support structures at the base, then peel them away from the model surface with force applied parallel to the surface rather than pulling perpendicular. For tight areas, use a dental pick or hobby knife. If supports are fusing to the model, increase Top Z Distance to 0.25mm in the advanced support settings.
What is support painting in Bambu Studio?
Support painting is a tool in Bambu Studio that lets you manually define where supports should and shouldn’t generate. Left-click to paint purple enforcer areas that force support generation regardless of the threshold angle. Right-click to paint red blocker areas that prevent support generation in specific areas. Access the tool from the build plate toolbar — it’s the brush icon labeled “Supports Painting [L]”. Your model must be selected before activating the tool.
What does “On build plate only” do in Bambu Studio?
The “On build plate only” setting restricts support generation to structures that originate from the build plate rather than from the model surface. This typically produces cleaner support removal because plate-originating supports are easier to separate cleanly than surface-to-surface supports. The tradeoff is that some internal overhangs may not be reachable by plate-originating supports — always check the layer preview after enabling this setting.
What are support interface layers and should I use them?
Support interface layers are densely-printed layers at the top of support structures that provide a smooth surface for the overhanging model layers to print on. They’re enabled by default (3 layers) and should stay enabled for most prints — they significantly improve surface quality on supported areas compared to printing on bare support infill. Reduce to 2 layers if support removal is proving difficult; increase to 4 for maximum surface quality on critical overhangs.
Why are my supports fusing to the model?
Supports that fuse to the model almost always indicate a Top Z Distance that’s too small. The default is 0.1mm — if supports are fusing, increase to 0.2–0.25mm and reslice. Also ensure you’re removing supports while the print is still warm — supports that have fully cooled are significantly harder to remove cleanly. PETG is particularly prone to support fusion due to its sticky material properties — see the material-specific settings section above.
Can I use different filament for supports in Bambu Studio?
Yes — on multi-material setups, you can assign a different filament to support interfaces using the “Filament for Supports” dropdowns in the Support tab. On the Bambu Lab H2C with dual extruders, this enables water-soluble PVA support interfaces that dissolve in water after printing, leaving zero surface marks. On any AMS-equipped printer, assigning a visually distinct color to supports makes identification and removal easier.
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