Is this model watertight?
Get a closed/not-closed verdict for a model's mesh topology, with every open boundary edge or non-manifold edge that keeps it from closing.
A mesh is watertight only when every edge is shared by exactly two triangle corners, checked with exact-coordinate adjacency rather than a tolerance-based weld: two triangle corners count as the same point only when their coordinates are bit-for-bit identical. This page leads with that verdict and the topology findings behind it.
A model assembled from parts that are geometrically touching but not exactly coincident can still report open boundary edges even though it looks closed when rendered.
This page leads with one question; the rest of the report is below. Open the full Inspect report →
Choose a model
Select one supported file to inspect immediately using common millimetre and right-handed Z-up defaults. If the source uses a different frame, adjust its Expert settings first.
Local boundary: the source file and its geometry stay inside this browser's dedicated inspection worker; only the structured report leaves the worker, and nothing is uploaded.