A min on a head is a real problem. Its supposed to take about 5 to 25 sec for this head. The displacement map is supposed to draw shadow on its map with the lights before the render. Anything grooves is polygons build up based texture map script, it benefits on some modeling projects not displacement map. Displacement map is only made for realistic detail inbetween the guided polygons. You could not have everything with displacement or trees in the scene with the head. I have realistic danielion plant 2+ million polygons with some transparent in shaders and Carrara barely can handle it. And it took me 45 min for a rendered frame. 3Ghz with 2GBRamBus Falcon will you please check Task Manager if it ran up memory when rendering and tell me how much it took. Anybody want eggs I cooked on my CPU?