If you have say several semi transparent walls in front of you at different distances, but all are within a single mesh, how will Unity sort these faces? Will they appear in order?
No, they won’t (necessarily) appear in order. You have to use different meshes. An example would be windows of a house: If the windows are part of the house mesh, and they have a transparent texture, then it’s possible that they get drawn through walls (if the wall is between the window and the camera).