From your CAD
Joints and hardware that are really there
Renders are built from the manufacturer’s CAD (STEP, Fusion 360, Rhino or SketchUp), so dimensions and proportions are the product’s own, not a lookalike model.
I am a mechanical engineer and design products in Fusion 360, so I read the model while I build the scene: dowels, cam locks, hinges, drawer runners, gas lifts, lamp sockets and cable routing are shown where they sit in the real assembly. Details that look wrong for production are flagged before they reach your catalogue.
STEPFusion 360RhinoSketchUpRendered in Blender