jwnimmer-tri
commented
8 months ago The front/back/both is a property of the material you're assigning to a mesh: https://threejs.org/docs/#api/en/materials/Material.side
One way to do that is a separate geometry & material, with the material specifying a side; see e.g. meshcat/test/transparent_ellipsoid.html.
With a _meshfile_object like a glTF mesh, the material sided-ness is part of the asset; see e.g. meshcat/test/opacity.html.
Looks like back faces are not being rendered by default. Is there an option to render them? I have a mesh that is not water-tight and when looking from behind, parts of it disappear.