Arseney

As for the precision parameter, sure. I just double-checked it and the result was the same. ```python mesh.remove_duplicate_vertices(precision=6) mesh.is_manifold() -> True mesh.is_connected() -> True mesh.is_valid() -> False mesh.is_trimesh() -> False...

Maybe I've pasted already cleaned mesh, let me double check

Interesting that rebuilding Mesh from coordinates only automatically removes duplicates. from 194 to 48 vertices Here's a list of faces, hope it helps to reproduce the initial mesh ```python faces...

Vertices as a 1d list ```python vertices = [ [1.624855, 4.470224, 3.4], [1.624855, 4.470224, 3.8], [1.624855, 4.52715, 3.804071], [1.624855, 4.582917, 3.816203], [1.624855, 4.63639, 3.836147], [1.624855, 4.68648, 3.863499], [1.624855, 4.732168, 3.8977],...

> the problem is not with the removal of duplicates. it is just that there are two invalid faces. removing the faces with zero area results in a valid mesh......