I undertook the challenge to convert this obj model into Poser for a friend.  In cinema4d the model geometry looks correct:  all the polys are quads.  When I import it into Poser everything has been triangulated and half of the polys have diappeared.  Check out the image I included.  Does anyone have an idea of what is going on and how to correct it?

I would appreciate any assistance you good folks can offer.

May be an unrecognized end of line character.

Try opening in UVMapper, and resaving. That often sorts it out. Other than that if you would like to send me the OBJ file as exported out of cinema4d I'd be happy to take a look at it.

Did you use the riptide-plugin for im- and exporting the obj from C4D. If the target is poser it's essential. The normal C4D export isn't really useable for poser.

Heres the image I forgot to include int he first post.

I didn't use the riptide plugin.  The model was an obj so I just brought it straight into poser.  Also, since this isnt my model I cannot give it to anyone for assistance.  All help will have to be done in the forum--unfortunately

The most obvious thing you need to do is turn on the "Make polygon normals consistant" option when importing into Poser.
If that doesn't cure the "missing" polygons, then you'll need to use a modelling app to correct them (or as PhilC mentioned earlier as trip through UVMapper will often fix problems).

Thanks nruddock but that didn't do the trick.  I have tried every variable (except UV Mapper) and cannot get it to import correctly.  In hexagon silo and Poser 7 it looks like poop only in C4d does it look good.  But there are no UV maps to go with it and I don't want to UV map it all from scratch.

It's likely one of your C4D export settings is doing this... I'm not a C4D user so I couldn't help you with specifis. When I use 3DStudioMax, there's a number of export settings that could change my geometry in undesireable ways, some of them looking a lot like what you're getting.

Your best bet may be asking someone in Cinema4D forum what are best Cinema export settings. ... or maybe one of C4D users will stumble upon this thread... (but there's no C4D in the title, so they may not...)

Looks like on export from Cinema, the mesh got triangulated, instead of being left as quads. I'm not aware of anything being able to fix that, outside of the originating application (C4D)

As it looks like you'll need to re-export from C4D, use Riptide.

Riptide Pro the newest version works really well. Plus if you just want to try it, it works unrestricted fro 30 days in Demo mode or for free.

look at the obj file and see if the F lines have been extended to a new line - if they have Poser wont read the continuation line and will read it as a tri not a quad.

I my be able to fix the file if you can send it to me at marks542004@yahoo.com   but you really need a regular solution.  

Quote - look at the obj file and see if the F lines have been extended to a new line - if they have Poser wont read the continuation line and will read it as a tri not a quad.

If that is what's going on is easy enough to fix with a script (PERL or Python depending on whats available).

Somwhow I've got the idea it's a Poser 7 prob. In P 6 it was never a prob to export a body part of a figure, modify it in a 3D app and use it as a morph target. Now I have to use UV Mapper to re-arrange the vertices.

This was the sort of thing that was a recent problem in a few freebie models 
Poser wasnt reading the continuation  
a large number of quads suddenly became tris .

f  26349/10767/12873 26373/10766/12872 26374/10768/12874
26350/10769/12875
f  26350/10769/12875 26374/10768/12874 26375/10770/12876
26351/10771/12877
f  26351/10771/12877 26375/10770/12876 26376/10772/12878
26352/10773/12879

easy enough to fix once someone figured it out.