Question for you all. (I have done a search and read all the posts to date; however, I am a little confused.)
The client has hired a sign contactor to provide a Project Job Sign with my rendering on it. The sign is 4' x 8', and I can only assume that the image will need to be around 5 or 6 feet long.
The original rendering I did was a 600 dpi (approx. 2500 x 1600 pixels) and looks great when printed on a 8.5" x 11" sheet. If I remember, the jpg was around 1.4 MB. The sign contractor asked if I could give him a rendering JGP which is roughly 6700 x 13,500 pixels.
Just as a test, I did a new rendering at 1200 dpi and the pixels and file size were the same as the original rendering, approximately. I also don't notice any real difference between the two when I zoom into the rendering. They both start to break up at about the same magnification.
Mr. Raiz has written that one could simply set the render size to it's ultimate print size and limit the pixels to 100. (His example was a 30"x40"x100 x 100, thus producing 12 million pixels total.)
Others have suggested keeping the rendering size small and using a higher dpi, and then using other programs to "RIP" the image to enlarge.
Your help is greatly appreciated