The notion of render timing is changing considerably, if you are willing to accept longer rendering for better imaging, go for it. If you want to render within a shorter time, then you will need to cut corners to achieve the best possible image. IDL settings will need substantial tweaking, texture maps may need to be reduced in resolution, use minimal lighting with more enviromental illumination. Deconstruct hires background objects and not use displacement mapping in everything. And if you are using Poser 1, then SuperFly might be a better option for rendering.