I need a standalone 3D catalogue that lets users explore individual mechanical components on a Windows desktop. The goal is to provide an intuitive, interactive reference—engineers should be able to rotate, zoom, explode, and pull basic metadata for each part without an internet connection or additional software. Here’s the workflow I have in mind: • You receive STEP/IGES files (around 50 parts to start). • You optimise geometry and textures so the application loads quickly even on mid-range PCs. • The compiled viewer runs natively on Windows (no installer preference—an executable folder is fine). Key functions I must see: • Real-time orbit, pan, zoom, section cut, and explode. • Click-to-select parts and read predefined attributes (part number, material, weight). • Search or filter by part number. • Screenshot export at the current viewport. • Simple, branded UI: logo in the corner, dark/light toggle. Preferred tools are Unity or Unreal (open to C++/OpenGL if you have a leaner approach). Deliver the full source project plus a signed Windows executable. Once compiled, it should run offline from a USB stick—no server calls, no hidden dependencies. I’ll provide branding assets and component data sheet in CSV. After delivery I’d like one revision round to polish UI or performance. Tell me which engine you’d use, how you’ll tackle lightweight loading, and show any similar viewer or configurator you built.