I’ll provide continuous GoPro footage shot along the inside of a storm-water pipe run together with a few reference measurements (pipe diameter, chainage marks). From that material, I need a single, high-resolution 3D mesh that captures every bend, junction, and defect to survey-grade accuracy. The finished model must: • be delivered as a clean, watertight OBJ file, scaled from the supplied reference points so it drops straight into AutoCAD without further adjustment • maintain dimensional fidelity across the entire length (target tolerance ±2 mm) • clearly show laterals, joints and any observable obstructions in the geometry Please keep the native project files from your photogrammetry package so I can review the alignment if needed, but only the OBJ is required for hand-over. Let me know up-front which software you plan to use—RealityCapture, Metashape, Meshroom, or similar—as long as the final output meets the criteria above, I’m flexible. I’ll share a download link to the raw footage once we’ve agreed on milestones, and I’m happy to answer any pipe-specific questions to help you nail the scale and orientation.