How to make a good TOPOLOGY in Maya - 3D Modeling

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[@uaemail1997]

I want to know if I'm Making hard surface modelling in Maya, using polygons then it's not exporting in STEP format, it's saying use NuRbs and curves, then it exports like a CAD model for CNC printing. But I can't convert polygon hard surface model into .STEP or .XT format. Can you please tell me how can I convert polygon model into something so I can export it and preview in STEP or XT format

[@uzumakinarutoboruto2027]

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