ADL currently does not support the import of graphics (tif) with 16- or 32-bit color depth. Customers provide us with graphics in 16 and 32 bit We need to change the graphics to 8-bit, but this will result in a loss of quality.
I think we'd need to see some examples of the files you have a problem with as the TIFF format is broad enough that there might be something in the images which ALD doesn't yet handle... Can you raise a support case?
We've taken this on as a development story for a future release. We will need to integrate libTiff in order to handle TIFFs with this level of colour depth and convert them to something which can be handled by PDF.
