I am using Affinity Photo 1.4.3 on a late 2015 iMac running Mac OS 10.12.
I have written a program that exports pretty simply tiff files. Every app I have tried reads the files my app writes, except Affinity Photo. I have tried Preview, Photoshop, Lightroom, Aperture, Pixelmator, Viveza 2, Safari (I did not know it worked as an image viewer, but it does)).
I think maybe Photo is trying to interpret the tiff file as a RAW file. I have attached two screen grabs. One shows the upper left corner of the Photo window with one of the files my app wrote. The other shows the upper left corner of Photo with one of the input files to my app (which was written by lightroom). My app averages stacked images to reduce noise, so I expect the two images to be pretty much the same except for noise.
Any suggestions or ideas on what might be going on here?