I've been able to cook up the "merge obj files" utility that was mentioned earlier in this thread, it's available here:

http://moi3d.com/download/MergeOBJ.exe

And I updated the wiki resources page to list it:

http://moi3d.com/wiki/Resources#MergeOBJ_utility


So hopefully that should do the trick if you want to merge OBJ files together into a single larger file but still preserve vertex normals which unfortunately other freely available programs have a tendency to discard.


When you run it, it will show a simple dialog and you build up an input files list either by pushing the "Add files" button which lets you use the file open dialog (w/multi select) or by drag/dropping files on to the dialog window.

If you want to start over you can hit the Clear button to blank out the input files.

Then when you have all your input files listed up, you push the "Generate merged file" button which will ask you for a filename to write and then crunch out one single OBJ file that has all the other stuff combined into it.

Most things like object names and vertex data pass straight through to the combined file, but the index values of all faces are adjusted to make them correct in the new vertex list and also it gathers up all the materials used by every file and puts that out into one combined material file as well.

Hope it's useful!

- Michael