I had troubles with deciding if a file is a part or not too, i never figured out an algorithm for doing it. Your example of mirrored parts clearly shows the problems.
One thing i think we can agree is that the file extension is a poor way to decide, as no tool does any distinction and they all work interchangeably.
Btw, i don't think there's a rule that forbids ldr file from having tiangle/quads commands directly, inbetween subparts commands.
One thing i think we can agree is that the file extension is a poor way to decide, as no tool does any distinction and they all work interchangeably.
Btw, i don't think there's a rule that forbids ldr file from having tiangle/quads commands directly, inbetween subparts commands.