Exporting for CAM, 3D Printing, Rendering and Web

Overview#

The same part may need to leave Fusion four different ways in one week: as geometry for a CNC shop, as a mesh for a 3D printer, as an asset for a renderer or website, and as a drawing for review. Each destination has different priorities. Machining cares about exact arcs and datums. Printing cares about watertight meshes and correct units. Rendering cares about materials, UVs and polygon budget. The web cares about file size.

This page gives a recipe per destination. Several of them can be done entirely inside Fusion without exporting at all (Fusion's Manufacture workspace does CAM, Make > 3D Print sends to a slicer, in-canvas and cloud rendering exist), so the first question is always whether you need to export.

Where to find it#

Step by step#

For CAM and CNC#

1. Decide whether to export at all. If you own CAM in Fusion (included in the standard license in some forms; certain strategies belong to paid extensions; verify your plan), set up CAM in the Manufacture workspace directly on the design. No export is needed, and the toolpaths update when the model changes.
2. If sending to a shop or another CAM system, export STEP. Exact arcs and holes matter for toolpaths.
3. Orient and locate the part so the stock origin and Z direction are obvious, or provide a drawing indicating the datums and WCS.
4. Remove unnecessary geometry: fasteners, cosmetic details, assemblies they do not need.
5. Add a PDF drawing with tolerances, threads, finishes and material. The STEP does not carry those.
6. For 2D cutting: choose DXF.
   • For a sketch profile: right-click the sketch, Export DXF.
   • For sheet metal: use the flat pattern DXF export (see the sheet metal section), which can include bend lines on separate layers.
   • Check the DXF in a viewer: arcs preserved, closed contours, units, no duplicate lines.
7. Check kerf, minimum feature size and units with the shop.

For 3D printing#

1. Use Make > 3D Print to hand the selected body to a slicer or utility, or use Save As Mesh.
2. Choose 3MF if the slicer supports it; it carries units and avoids the unit ambiguity of STL. Otherwise choose STL (Binary) for smaller files. ASCII STL is only for debugging or odd tools.
3. Set Unit Type to millimeters unless your slicer expects otherwise.
4. Refinement is set in the Make > 3D Print dialog (or Tessellate), not in Save As Mesh. As general guidance rather than Autodesk data, finer deviation suits small smooth parts; check against your printer's resolution.
5. Per-body files: choose one file per body when printing separate parts, or one file with several bodies for a combined plate.
6. Open the result in the slicer and check dimensions, orientation, overhangs, wall thickness and manifoldness.
7. If the slicer reports non-manifold edges, return to Fusion: check for stray surface bodies, overlapping solids (combine them) and zero-thickness features.

For rendering outside Fusion#

1. Export OBJ (with MTL) for broad compatibility, or FBX/USD if listed. Set high refinement for smooth surfaces.
2. Separate bodies by material so the renderer can assign materials. Name bodies clearly.
3. Think about scale and axis: tell the artist the unit and up axis.
4. Note that Fusion appearances (PBR materials) do not fully map to other renderers. Plan to reassign materials.
5. Consider rendering in Fusion (in-canvas for quick work, cloud render for final images) to avoid the conversion. See the rendering section.
6. For turntable or exploded views, Fusion's Animation workspace exports video directly.

For the web#

1. Sharing a view: use a public link or shared link from the Data Panel to give a browser view with orbit and measure; no export required. Check the link's permissions; verify in your version.
2. Embedding or hosting your own model viewer: you need a web-friendly mesh. Fusion's Save As Mesh produces OBJ, STL and 3MF; convert to glTF/GLB with an external tool (Blender, or a command-line converter). Whether Fusion exports glTF natively depends on version; verify in your version.
3. Reduce size: use Medium or Low refinement, reduce triangle count (Mesh Reduce), drop unneeded bodies, and compress textures in the converter.
4. Images and video: render stills in Fusion (PNG or JPEG) and animations as video for pages that do not need interactivity.
5. Drawings online: export PDF; set up with embedded fonts and check file size.

Options reference#

Format details you will be asked about#

3MF vs STL. STL is a bare list of triangles. 3MF is a zipped XML package that adds units, color, materials, multiple objects, and metadata; slicers such as PrusaSlicer, Cura and Bambu Studio read it. Prefer 3MF for modern workflows. Keep STL for compatibility with older toolchains and services that insist on it.

Binary vs ASCII STL. Binary is compact and universal. ASCII is human-readable, huge, and sometimes needed by quirky firmware or services.

DXF versions. The recipient's software may only open a specific DXF release. If Fusion does not offer a choice, ask the recipient's tool to import and re-save, or use a converter. Verify in your version whether a version choice is exposed.

G-code. Produced by CAM post processors, not by File > Export. A post processor is machine-specific; use the one that matches your controller and test with simulation first. See the CAM section for details.

Color in prints. Multi-color printers read color from 3MF (and sometimes OBJ with materials). Verify the slicer shows the colors after import.

Tips and pitfalls#

Tip: Make a template design with your standard export settings and notes: units, orientation and a title block. Starting from consistent geometry placement makes every downstream export predictable.

Tip: For print iteration, the Make > 3D Print route is faster than manual export. For archival, export both the 3MF and the F3D together and note the version.

Tip: Run a quick sanity check on every outbound file: open it in the receiving tool (or a stand-in), check dimensions, and look at the first 5 percent of the process (slice preview, toolpath preview).

Warning: Do not send a mesh to a machine shop and a STEP to a printer without a reason. The wrong representation costs time on both sides.

Warning: Some shops machine directly from the STEP geometry and trust it as the specification. If the STEP differs from the drawing, they may follow the STEP. Keep both in sync and state which governs.

Warning: Some paid features, such as advanced CAM strategies, simulation and some export options, belong to extensions or paid tiers, and Personal use restricts commercial usage and some functionality. Check your license before promising a deliverable.

Warning: A watertight-looking mesh may still contain internal voids or inverted shells that slicers interpret as holes. Use the slicer's repair and preview layer by layer.

Practice exercise#

1. Design a small bracket with holes and a curved edge.
2. Make a 3MF using Save As Mesh at Medium and High refinement. Load each into a slicer and compare estimated print time and visible faceting on curves.
3. Export the same bracket as STEP and open it in Fusion's Manufacture workspace in a new setup; observe that CAM uses the geometry directly.
4. Create a sketch of the bracket outline and Export DXF; open it in a DXF viewer, measure the overall length and confirm it matches.
5. Render a still of the bracket in Fusion and note which parts of the pipeline did not need an export.

Expected result: you have one validated file for each destination and know which steps were unnecessary.

Related#

• Export workflow (export-workflow)
• Mesh vs BRep exchange (mesh-vs-brep-exchange)
• Format cheat sheet (format-cheat-sheet)
• Flat pattern DXF export (08-sheet-metal-plastic/flat-pattern-dxf-export)