Rhino image textures don't export with .obj files. The rhino color value goes into the object color. You also have highlight, ambient and reflective color values in poser. These affect how the object looks and even affect the appearence of image maps applied over them. These default to white, grey, and black on my system. You need to map your object with a program like uvmapper. This creates a bitmap you can paint images onto. You apply this image to the texture map in poser and check the box texture changes to the entire figure. To get the poser material window click on the render menu and pull down to materials.