I think the Carrara Render/output tab is odd. It does work weird (but it works). That is why I use the final dpi size that I will end up with in Photoshop to render in Carrara. All my images end up in Photoshop anway. A little adjustment here and there in Photoshop and it's done. Simple as pie. i do this almost everyday. I would also say it is a fair bet that ultra long renders, renders hardware wear. )-: Regards, Steama