Reference to 3D reconstruction

Treat supplied images and measurements as the source of truth. The goal is a repeatable asset with documented assumptions, not a plausible but unmeasured mesh.

Plan and register references

1. Preserve originals and record file hashes, pixel dimensions, orientation, crop, lens/orthographic assumptions, and known dimensions. Do not silently stretch a reference to fit a camera.
2. Classify the task: single-view concept, front/side/top orthographic fit, multi-view reconstruction, wireframe-to-mesh, logo/mascot, or texture-driven surface. For single views, label depth as inferred.
3. Establish Blender units and a named REF_* collection. Add image empties or planes with locked transforms; keep them out of final renders/exports.
4. Create measurable landmarks (corners, centerlines, extrema, joints, and silhouette breaks). Store expected image-space positions and tolerances.