I still haven't been able figure out why the triangle values don't translate to .obj "f" values when I enter them manually (they don't export with the geometry in MoRE so I enter them manually to test in 3D builder and 3DS). I get an error in 3D Builder and nothing renders in 3DS Max.
I had no clue what the Clst value could be, so I've been googling. I found this article/guide here that has information about Clst values as they relate to 3D objects.
From what I gather, what we are seeing as .ea3 (Electronic Arts 3d file??) extension could be a custom extension for what is a TDDD file format? According to a wiki, IFF was developed by Electronic Arts, and that is what TDDD and Imagine OBJ files are based on:
IFF (Interchange File Format) is a general-purpose binary file format introduced by Electronic Arts on the Commodore Amiga computer in 1985. It is sometimes known as IFF 85.
Here is another similar article about TDDD Imagine 3D object file format
And a wiki here and here about the file formats.
I put the first article into a .txt file and zipped it to preserve... I don't know how that page is still being hosted in 2017 when it was last updated in 1995??
Hopefully this gets us somewhere.