Well I wondered why only certain things also and not others. I do not have poser. That is an obj from daz studio. But D|S doesn't seem to export a proper mtl file. I haven't been doing to much animal and people yet w/ c5, but hex outputs a proper mtl and it comes in fine. D|S needs better export. On poser can't say much since I don't use it right now.It is frustrating that all this is really just file format issues.

No need to think outside the box....
    Just make it invisible.