Hi Louguet, Are saying then- that, if I use an Athlon 64 (which I do) that I can open two instances of Vue 5 and start rendering two big scenes overnight- and that both scenes will render at the same approximate speed as just one scene would (not just 2x --making the render time twice as slow?) Or to put it more clearly- if a scene takes 5 hours to render... I can then render 2 copies of the scene- and each will still take only 5 hours (not ten?)