Hi nameless, FBX files do contain a field in them for the unit system and MoI does set it when it writes the FBX file.

However, .obj files do not contain any such unit field in them so there isn't any way for MoI to set units on the .obj file export.

You can set a manual scale factor for .obj export under Options > Import/Export > OBJ options > "Scale factor". So if the FBX export is correct you could put in a scale factor there in MoI to have the .obj export match it.

If you are exporting something like a 1cm box to Octane using FBX and it's not coming in there at a 1cm size, then that sounds like a bug in Octane's FBX importer and I would recommend reporting it to them and sending them a sample file that does not come over in the expected size.

- Michael