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A little research has reveals that Affinity Photo is happy to print an image having less than 512Mpx, but crashes when printing an image having more than 512Mpx. I would like to better understand this limit. The limit is relevant to me because I am printing large, high-resolution images on an Epson 20000. Note: 512Mpx = 536,870,912 pixels = 1/2 Gpx Note: Although Preview has difficulty displaying some images that are larger than 512Mpx, it nevertheless prints correctly even when it can't display. For example, Preview can print a 2Gpx image. Therefore I conclude that the limit is not a MacOS limit, but is an Affinity limit. Hypothesis: Photoshop has this same limit. My print-person uses Photoshop; he reported that he can't print the large images I am giving him -- that's what led me to investigate using Affinity Photo. Method: I export TIFF from vector graphics on Affinity Designer, and then print the TIFF with both Affinity Photo and Preview. For these tests I don't actually print on paper, but instead simply observe whether or not the print command results in a CUPS print job having a non-empty PDF file in directory /var/spool/cups/ . When the image is larger than 512Mpx Affinity Photo crashes almost immediately after pressing "print", resulting in a CUPS job having an empty pdf file. Thanks for any news on this, as well as the possibility that the limit will disappear in future releases. Martin Brooks