Load a glTF/GLB model and our Manifold library will attempt to merge it into a set of manifold objects. If the model is water-tight, you can download the new GLB which will have our EXT_mesh_manifold extension, thus preserving the manifold data without losing any mesh properties.

If the View Manifold GLB checkbox is enabled, then some meshes in the model have open edges and don't represent a solid object. Check this box to see only the manifold parts, which will also enable them to be downloaded. If the download button is still disabled, it means there were no manifold meshes found.