I have about 200 photos which I have to make into a single big collage (48" X 72"). The height might vary, the width is fixed. I shoot raw and have the individual photos in Lightroom. I will incorporate JPEGs from another person. I plan to create 6 collages (24 X 24) in Picasa and then stitch them together using image magic.
When should I sharpen the photos for Output. Should I sharpen the individual photos for output and then make the collage, or should I apply output sharpening to the final collage image? The printer actually prints in 24" roll paper (will be printed at OfficeDepot) I will get two 24" X 72" prints which I we will then mount on the frame.