Why are the faces missing on the imported object?  One time it's the wheels, next time something else. And sometimes a whole piece or more isn't there.  It seems to work fine in Poser 5, top left in the image, (the only other version I had to try it in.)  And as far as I can see the normals (top right in image) are OK & no backfaces showing on export from the modeler. 

This isn't the first time this has happened & it's beginning to get really frustrating. 

You have to apply logic here which includes rejecting all assumptions.

If things are inconsistent, then you have to question the belief that they should be consistent.

First assumption that I've seen people make so many times. They assume the document they saved from the modeler (Wings, Max, whatever) is the document they are loading into Poser.

I just had this happen the other day with my partner, Tom. He kept showing me a material in Max, and then showed me the polygons were not assigned the same when loaded into Poser.

Turns out, he had the obj in the geometries folder and the character folder. Poser was loading one he had saved several days ago. He incorrectly assumed he was loading the one he was saving.

A two line python script showed him that the obj he loaded was not what he was assuming he had loaded. Perhaps you would find it useful?

Save the following to a .py file and run it (make sure you have an actor selected that has geometry)

 

import poser

print 'Current Actor Geometry is from', poser.Scene().CurrentActor().GeomFileName()

You've also got something funky going on with the wheels in that one.

Something extremely funky going on with the whole thing. And I think it might be time to give up.

bagginsbill..  The objects aren't in a runtime folder, just the one I exported them to. I did have duplicates in another folder so deleted them & tried again but no luck. The caboose imported into Poser with no roof or wheels..

I spent this afternoon remapping some of the meshes & remodeled a couple to see if it that would help.  Also changed the way the texture is applied to the wheels. None of that helped either.

I'm sorry I don't have enough Poser experience to do the python script. Pretty much all I know are the basics & that's why I get so frustrated when something doesn't work. 

Does it render the same way (portions invisible?)

 

Sometimes it renders without the faces & sometimes it shows what looks like a single poly backface or just the wheel rim.

There is one easy way to check if Poser imported the object with some inverted faces.

Select the object which has the problem

Go into the group editor. The object has 1 or more groups (if not, create a new group and add all). If all the faces are correct, all should be red. If not, press Reverse Group Normals. If now all the missing faces turn up in red, there definitely is a problem with back facing polygons

At least then we know if there is a problem with backfacing polygons.

If it is, you can try to check the "Normals Forward" option in the material setting of the object

 

Today it's the caboose missing a roof & wheels when imported.  The rest of the train was red in the group editor.  All of the wheels are the same mesh so you'd think that if one works, they all would.

All of the pieces work fine if I import them individually (see image) It's just the preset version that's giving me fits.  Maybe something confusing Poser when I import the whole train.