HI Lordfox, re: image attachment - yes that's normal that you wont' see OBJ listed there. MoI does not natively handle OBJ importing, if you want to do it, you need to use Max's plug-in command to do it. The plug-in is run as its own command, it will not show up in the file types list that you are showing there.

Currently MoI does not have any mechanism for plug-ins to extend the main file open dialog box. I do want to add that in the future but for now since there is no way for a plug-in to in to modify that standard list it's implemented as its own specific named command that you have to launch, rather than trying to use the regular File > Open.

- Michael