I'm trying to develop my digital workflow for processing my scanned film negatives. Right now, I have a bunch of 16-bit greyscale TIFF files that are between 200-400 MB (about 14k x 14k pixels). I do some batch processing (exposure, curves, etc.), then I'll open one as a smart object in PS to do dust and blemish removal, and any fine tuning. If I create just one new layer in the TIFF file, when I go to save this new file, I get an error message that I've exceeded the 4 GB file size for a TIFF! Can anyone help me figure out why my file size increased tenfold? Is the bloat happening when LR hands off the TIFF to PS (i.e. the newly created file), or is it happening when I save the file with the additional layer? I don't get this bloat when I have LR create PS files in psd format, just TIFF. I don't want to use psd, though, because I can't open the smart object in ACR within PS (basically, having LR hand off as a psd defeats the purpose of using LR). What other workflow aspects do I need to consider? Thanks, Patrick P.S. I'm using whatever is the latest Adobe CC flavor of LR and PS at the time of this posting.