Why bother with another program for interior shots? Just use the primitives available in Poser. Texture the "one sided square" or "cube", adjust the size upward, and use them for walls. This would cut down on render times and give the same effect a high-end modeler could produce. If you really want to practice making models, you may want to try "Anim8or", a free 3D app found at http:www.anim8or.com