This is something I want to ask. Do .OBJ files store information about what program they were created with?
http://www.fileformat.info/format/wavefrontobj/egff.htm
It doesn’t appear to store information about the program that made it.
That information can be stored in a comment, but it’s not part of the spec.
–Eric
Easy to check. Open the*.obj file with a text editor, it`s a plain text file anyways, and have a look at the top. Usually the comments are placed there.
I would suggest to use a legal 3D software. Then you don`t have to worry about that 