Prepare FBX geometry for STEP
The FBX-to-STEP route uses the FBX reader, mesh preparation and the STEP writer. Choose the geometry and representation required by the destination application. STEP can carry mesh data as well as BRep; this route does not imply recovery of analytic CAD surfaces from a mesh.
Read the FBX input with the commercial interface and select the model geometry needed by the receiving application. Inspect the available scene organization and placements before preparing output meshes.
Configure the STEP geometry and document mapping
Reuse imported mesh geometry or tessellate imported surfaces where needed. Select a static model state for destinations that do not carry scene behavior. Do not infer full animation or material compatibility from the fact that both files are scene formats.
Write the imported model through the OCCT STEP interface. STEP supports BRep and mesh workflows, so choose the representation supported by the receiving application. Use the document layer when names, colors and assembly relationships are available and need to be transferred.
Validate the converted model
Compare geometry coverage, scale, orientation and part placements. Verify each required appearance or structure property through the complete reader-to-writer route.
Reopen the STEP file in the destination and compare geometry coverage, placements, names and colors. A mesh representation remains polygonal inside STEP. If the next task requires solid modeling, verify that the source and output contain the required BRep geometry.
For repeated jobs, retain the source, preparation settings and representative output checks. Discuss this conversion with the input files, destination application and required geometry and attributes.