I opened a TIFF file in Photo, which was created in Photoshop CS5 (Mac OS X). The photo contained a channel mask. When opened in AP, the mask was applied, rather than showing the entire image. With the TIFF image, if I go to the Background Alpha channel, I can Invert it (reverses what's revealed) or Fill it, which removes the mask altogether. When the same Photoshop image is saved as a PSD and opened in AP, I can find the mask, load to the Pixel Selection channel, and then create a mask layer. Not very straightforward.
What I can't find is how to place either image in Publisher and select the channel. With InDesign, I can place an image and can choose whatever channel mask I want, even if there are multiple masks. This makes placing variations of images in a document very easy.
I can't be the only person with lots of Photoshop images I would like to use with Affinity. It makes transitioning difficult.
TIFF file attached.
Boothe Memorial Park.tif