you can have the export include materials if you actually mean textures.  it will generate an mtl file, but since textures are only a small part of my materials, i've never bothered to try to get Poser to understand that mtl file.  but you mention glass, and since i see only two or three actual textures in your Blender render, i'm betting you mean materials instead of textures.  glass, for instance, is generally a defined material, not a texture, which is just the bitmap you're applying to the diffuse color.  materials are application, or renderer, specific.  you have to set them up in your rendering application.  if you weren't going to render in Blender, setting up materials there didn't do much for you.  i'm pretty sure Blender's internal renderer has lots of power Poser's Firefly does not, but that Firefly can't do anything Blender's can't.  i still use Poser for rendering because i loathe Blender's camera management, and SSS and a little more power with lights doesn't make up for the fact that i know how to create good materials and light with Poser.  if your scene, materials and lighting in Blender is already further along than in Poser, you might as well bring your figures into Blender and render from there.  especially since Blender's renderer is developing fast enough that what it can't do now, it will probably do in the next year or so. Firefly hasn't adopted new features so quickly.