I have all kinds of problems rendering in P6. I have never had difficulty rendering large images, but when I use more than a few models in the same composition p6 slows to a crawl. I have never had this kind of issue with p5. Heck the p5 texture shaded preview worked better with more than 2 models in the screen than the p6 box tracking does. I have a 2.6ghz p4 with 2gb ram. I had hoped that p6 would move faster than p5 now that it supports hardware acceleration, but that is not the case. If you pre-ordered p6 you got a good deal.......... eventually they'll probably release an update to make p6 more stable. If you didn't pre-order it DON'T BUY IT YET! It isn't ready. As hungry as you might be you'd complain if your pizza wasn't cooked. ............. and the p6 pizza is still thawing.