Workflow
Send geometry to mesh tools without confusing it with solid CAD
OBJ is useful when a downstream visualization or mesh application explicitly expects it. PurCad generates the mesh from a selected CAD version while keeping STEP, STL and 3MF available for other workflows.
Choose OBJ for a named downstream requirement
Use OBJ when a renderer, mesh editor or exchange partner asks for it. For mechanical CAD use STEP; for common printing use STL or 3MF. Format choice should follow the next tool rather than a belief that one file fits every workflow.
Generate the mesh from checked geometry
Resolve blocking validation issues, select the intended project version and request OBJ from Download. If several formats are needed, prepare them together so every recipient gets geometry from the same version.
Check scale and topology after import
Open the OBJ in the target mesh tool and compare overall bounds with PurCad. Confirm object count, normals and visible openings. OBJ consumers differ in their interpretation of units and materials, so inspect the actual handoff.
OBJ does not carry parametric intent
An OBJ mesh cannot replace the project parameter model or validation record. Make dimensional revisions in PurCad and regenerate the file rather than editing production dimensions indirectly through mesh vertices.