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For a polished PCB product image, keep KiCad as the design source of truth and use Blender for the presentation. The most direct route is pcb2blender: export the board from KiCad as a .pcb3d file, import it into Blender, then refine materials, camera, and lighting. The result can communicate how a design looks, but it is not evidence that the board has been manufactured, tested, or electrically validated.
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What moves from KiCad to Blender?
KiCad is where you design the board: its outline, footprints, placement, and engineering details remain authoritative in the .kicad_pcb project. Blender is the visualization stage, where you control composition, materials, lighting, depth of field, backgrounds, animation, and compositing.
pcb2blender pairs a KiCad exporter with a Blender importer and uses the .pcb3d interchange file. It is designed to make board updates practical without rebuilding the entire render scene. It does not guarantee that every custom model, texture, layer, or material will transfer exactly as expected; inspect the result and plan for some Blender cleanup. See the project README and releases for the current package details. The workflow and compatibility can change, so check the release notes and issue tracker for your KiCad and Blender versions rather than assuming universal support.
You will need a KiCad project and board file, the pcb2blender exporter, Blender with its importer, and a place to save the resulting .blend scene. Optional: FreeCAD and the free2ki workbench for preparing component models and materials.
Install the exporter and importer
KiCad exporter
The documented built-in route is Tools → Plugin and Content Manager → Plugins → pcb2blender. If that option is unavailable, download the exporter ZIP from the project’s latest release, unpack its plugins directory into KiCad’s plugin directory, and name the installed directory pcb2blender_exporter. Restart KiCad if the exporter does not appear.
Blender importer
Where offered by your Blender release, the project documents Edit → Preferences → Get Extensions → PCB 3D Importer. For manual installation, download the importer ZIP from the project’s latest release, then use Edit → Preferences → Add-ons → Install from Disk…, choose the ZIP itself, and enable the add-on. The project specifically cautions against unpacking the ZIP for this manual installation. Blender’s extension and add-on menus may differ by release; consult the project’s current instructions if the labels do not match.
Prepare the board before export
A Blender scene cannot repair missing or incorrect source geometry reliably. In KiCad, save the board and open its 3D Viewer to catch issues before export:
- Check that the board outline is closed and the board thickness or stackup is plausible for the image.
- Confirm that footprints have usable 3D models, model paths resolve, and component orientations are right.
- Review silkscreen, copper graphics, and other visible layers; hide construction or fabrication graphics that should not appear.
- Check connectors, LEDs, and other distinctive parts from the intended camera angle.
These are practical visual checks, not special requirements imposed by the exporter. If a part is missing in KiCad’s 3D Viewer, fix its footprint model or path there first. Save the board, then export into a dedicated render/ folder or beside the project so the render asset stays easy to find.
Export and import the PCB
- Open the board in KiCad PCB Editor (
pcbnew), not the schematic editor. - Choose Export to Blender (.pcb3d) and save the generated file.
- In Blender, choose File → Import → PCB (.pcb3d), select that file, and import it into the scene.
- Inspect the imported hierarchy, board scale, rotation, and orientation. Compare the board against a known dimension from KiCad rather than applying an arbitrary scale.
- Frame the model, then save a new
.blendfile before building the scene.
Start by checking that the board is neither mirrored nor unexpectedly rotated. If components or graphics are incomplete, return to the KiCad 3D Viewer and inspect the source models and layers before attempting Blender repairs. A re-export is usually a better fix for missing source content than polishing an incomplete import.
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Imported materials may be a useful starting point, but give the major categories deliberate, restrained treatments. A PCB that looks convincing is not necessarily a literal material measurement: visual readability matters, especially when the image must explain a design at small sizes.
- Solder mask / board: Choose the intended green, blue, red, black, or other board color. Use moderate roughness and only subtle variation; a mirror-gloss finish tends to look like plastic.
- Copper: Use a muted metallic tone rather than bright mirror-gold, so copper details do not overwhelm labels and components.
- Silkscreen: Keep reference text and markings crisp and high-contrast. If modeling permits, a tiny physical lift can suggest ink, but legibility at the final image size matters more.
- IC packages and connectors: Near-black or dark-gray packages and appropriately matte molded-plastic connectors usually separate better from the board than one uniform glossy material.
- Solder joints and hardware: Make joints brighter and smoother than the solder mask; use metallic shading and realistic roughness for screws or shields.
- LEDs: A tinted translucent surface with restrained internal emission can suggest an illuminated LED. Avoid an emission value so strong that it erases shape.
For finer component preparation, free2ki is an optional FreeCAD workbench, not a replacement for the main PCB transfer. Its documented sequence is to switch to the Free2Ki Workbench, select a model or its parts, use Set Materials, then export the selection (or the whole file if nothing is selected). The workbench creates a .wrz file beside the FreeCAD project. Its materials are intended to be recognized in Blender and to support the pcb2blender workflow, but custom models and differing setups may still need adjustment. The project also documents importing VRML/X3D assets in Blender via File → Import → X3D/VRML (.x3d/.wrl). Consult the free2ki instructions for installation and current details; the README describes manual installation rather than relying on FreeCAD’s add-on manager.
Make the scene feel like product photography
Choose a camera for the information
A three-quarter view shows both component height and board thickness, making it a strong starting point for a product image. Use a top-down or orthographic view when readers need to understand layout and labels. A low angle can feel dramatic but may hide the board surface; reserve macro close-ups for distinctive parts such as a connector or chip.
Wide-angle perspective can make a flat board appear warped. For a catalog-like image, use a longer focal length and move the camera farther away, then adjust framing. Depth of field should be subtle: excessive blur can conceal exactly the traces, labels, or components the image is supposed to explain.
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Light shape, not just color
Begin with a large soft key light above and to one side, a weaker fill on the opposite side, and a rim or back light to separate the board silhouette from the background. Use a neutral studio environment first; add colored or emissive accents only after the board reads clearly under plain lighting. A floor plane with soft contact shadows gives the board a visual anchor. A restrained reflection or shadow catcher can help, but a completely floating board often reads like an ungrounded CAD export.
Keep the background distinct from the solder-mask color. If copper pours or metal parts dominate, reduce their brightness or shift the light rather than making all other materials unnaturally dull. Place the important component or connector near a clear focal point, and keep the board outline visible.
Render for the purpose
Use a real-time renderer for quick composition checks and stylized images; use path tracing when more natural reflections and shadow interaction are important and you can afford slower iteration. Actual render speed depends on the Blender version, engine, scene, resolution, hardware, samples, and denoising, so there is no universal time estimate.
Render a low-resolution preview first. Look for clipping, missing textures, floating parts, or inverted-looking surfaces. Test denoising at the final output size: it can soften fine silkscreen or trace detail. Save a clean technical view separately from a more dramatic marketing image. Export PNG for a straightforward final image, or use a higher-dynamic-range format if you expect to composite or grade it later. Keep the .blend file and external assets organized so the scene can be reopened.
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When the board changes
One advantage of the dedicated exporter/importer route is that a late KiCad revision need not mean rebuilding the entire Blender setup. Save the updated board, export a fresh .pcb3d, and update or replace the PCB asset while preserving the camera, lights, and background where possible. Then check object names, hierarchy, material assignments, and the camera composition: a revision can change the imported structure or shift a feature that decorative scene elements were positioned around. The project describes this iterative update use case.
Troubleshooting by symptom
| Symptom | Likely cause | What to try |
|---|---|---|
| Export command is missing | Exporter not installed in the expected plugin directory, wrong directory name, stale KiCad session, incompatible release, or the schematic editor is open. | Confirm you are in PCB Editor; check the installation steps and pcb2blender_exporter directory name, restart KiCad, then check the project’s release notes and issues. |
| Import command is missing | Importer ZIP was unpacked, add-on is disabled, the preferences path differs, or the release is incompatible. | For manual installation, install the actual ZIP, enable the add-on in Preferences, restart Blender, and verify current compatibility notes. |
| Board or components are empty/incomplete | Missing footprint models, broken custom paths, unsupported assets, hidden layers, or export from an unsaved board. | Inspect the KiCad 3D Viewer first, repair model paths or footprints, save, and export again. Replace a problematic model with a known-good asset if necessary. |
| Scale or orientation looks wrong | Coordinate or unit mismatch, import rotation, or conventions in an intermediate VRML/X3D/CAD path. | Compare a known board dimension to the Blender scene and inspect rotation before changing scale. For alternate formats, check coordinate conventions through the intermediate tool. |
| Materials look wrong | Materials did not transfer as expected, meshes use inconsistent assignments, textures are missing, or lighting/color management alters the appearance. | Test under neutral lighting, inspect normals and material assignments, and assign simple category-based materials before adding complex textures. |
| Render looks flat or toy-like | Weak lighting, no contact shadow, excessive gloss, low contrast, or a wide camera. | Return to a soft key/fill/rim setup, add a floor and contact shadow, increase background separation, and use a three-quarter camera with restrained roughness. |
| New PCB revision disrupts the scene | Reimported hierarchy, names, materials, or geometry differ. | Reassign materials if needed, verify object positions, and recheck the camera and decorative scene elements before final rendering. |
Alternatives and when to use them
KiCad’s 3D Viewer is usually enough for quick engineering checks, placement review, enclosure-fit discussion, or a basic screenshot. Choose Blender when you need more deliberate lighting, composition, animation, or compositing.
STEP-based transfer can make sense if a mechanical CAD workflow or a STEP-capable Blender conversion tool is already part of your pipeline. It is not automatically better for a PCB render: materials, hierarchy, layer meaning, and board-specific visual detail may take extra cleanup, and the importer or converter’s compatibility should be checked before committing to it.
FreeCAD with free2ki is useful when you want to customize component models or prepare materials, particularly if FreeCAD is already in your workflow. It adds another application and does not replace pcb2blender as the primary board-transfer route.
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Quick Recap
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