Do a test Squid. Export an object from Poser as obj and then open the mtl file that is created with a text editor. There you can see what pathname Poser exports. OR, simply open a cr2 file from Poser in an editor as well. I enclose a screenshot of the interesting part. here. You see, not the full pathname, only from "Runtime" on. Therefore other programs can have problems to find those textures.

One day your ship comes in - but you're at the airport.