My quick sents as well about file names.
I. have found the best way to make file naming is to one, never have spaces in names,
2. never use underscores like we do all the time as some apps hate that very much, and really bad when working with video game engines.
3. I always use a period/dot Between names when using naming conventions as it works pretty much cross platform instead of underscores.
4. and textures should always be to the power of 2 in sizing, like 256x1024, or 512x512 and so on when making textures.
5. tgd2 does not support multi textures or sub mapping yet, and that can kill us for those that use this for making things in larger apps or if we wanted to bring in people. Although I have not tried to import a .obj person in yet, I am pretty sure it won't fly. But please oh please say I am wrong /smiles......
DT