Can any one tell me why my render is not coming out the size i expect ?When I have finished my picture elements as i want them i do a draft render and note the size eg one i am doing at the moment is 864X920 . for the final render i will up th quality to max auto and choose to render to exact size and i will multiply the size of the preview render by say 3x in this case so i set it to render 2592 X 2760 now a lot of times this has worked fine for me but sometimes like now the render is finished about a third of the way down leaving most of it not rendered any idears what I am doing wrong?