hmmm...I have to go to bed now....I'll test tomorrow a render at that size with a scene I have. What exactly are your settings under render in the Size area and are your atmospheric settings & what render setting are you using ie. final/broadcast/superior?. I can try to recreate the same problem. How many polys are in your pic??? I ask up front because I haven't been able to get over 7mil polys with 1 procedural terrain....only 3mil polys with 6 procedurals. But I'm willing to test tomorrow evening USA EST time...around say 5-6pm. For example, I tried to do a re-render of my lasted posted pic with Global Radiosity set, started the render at 6pm Sat. Night only to wake up and have about 2 lines completed, total render time was appx at 98hours o.O..I quickly quit that as the pic was not wort it LOL.