Cyber-Storm, the importing of mesh objects has always been a staple of Bryce. The Bryce application provides for such importations so there’s absolutely nothing odd about it. Poser people do it all the time.

Yes, as Rayraz says, any model built in any program can be brought in and be made part of the image and that includes Wings 3D. Your final image must be rendered in Bryce. Any retouching or added effects (post-work) done on the final Bryce image using outside image editors are also allowed. For the purposes of group enlightenment, the artist must account for all image manipulations. This includes what applications other than Bryce were used to create the image and how it was incorporated into the image. If you are using models created by another artist/model builder, credit must be given to that person/persons or commercial establishments.