Is it true that JPEGs lose detail each time theyre opened? Should I work only with TIFFs or PSDs?
No! If you simply open your JPEG, do nothing but view it, and then close the file, you will not lose detail. If you use the Save As command in Photoshop and choose to save as a lower-quality JPEG, cause ugly artifacts that diminish detail. Frequently re-saving JPEGs at the same quality level may introduce some artifacts, but you wont see them unless you zoom way into the image.Always work on copies of your original image, not on the original image.
