Closed Surface UV Coverage

This skill prevents a common false pass: a model looks textured from the front because it has a projected front image or curve overlays, but the closed surface has untextured back caps or plain sidewalls when viewed in a spin/turntable.

Failure modes to catch

• Back detail is only a floating plane or curve overlay, not a material/UV on the back surface.
• Sidewalls have procedural color only; no side UV island, generated/object coordinate material, or baked strip.
• A back projection covers only a center shape and leaves the actual silhouette/back mesh plain.
• Side/back QA uses front-biased frames and misses edge-on/back-on samples.
• Decorative HUD/aura is mistaken for surface texture coverage.

Required surface taxonomy

For extruded/logo-like assets, classify visible surfaces before look-dev: