Sounds like an issue with your graphic card/driver? Hard to tell from your description, can you post a polka-dotted pic or two? if you save the renders do the dots appear if you view them with other programs, like Irfanview32? If I was experiencing what you described, I'd proceed like this; 1] download & install the latest driver for my video card, ditto for my monitor. 2] if no change, I'd do as MacD suggests, copy any & all custom content (anything under Poser4Runtime, usually, that you've added files to since the original installation) 3] De-install Poser. (NOT Delete) & run Norton System Check or whatever tuneup software you prefer (to cleanup registry entries, & check your hard drive). 4] Re-install poser 5] download & install the latest patch for poser4 from Curious labs (4.03, I think). 6] see if the problem has gone away 7] Restore your custom folders, one-by-one; checking every so often that renders were still OK. I'd be surprised if the problem persists after all that, unless your Video card was going bad (possibly the memory on the card) - Poser supposedly doesn't farm much of the work of a render out to the graphics card, but all apps use it one way or another. Good Luck! Jerry B