Most of the stuff in my gallery took an hour+ to render using raytrace if there are reflections. Gas Riot on410th took far longer because of the displacement map used on the catsuit. On average I notice that adding displacement maps adds 10-20% to the render time, and adding scripted lights, or pw effects can double the render time at least. The Couple took 3-4 hours because of the skin shader on M3, and the reflections.