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Hey there,

I've already in a couple of forum threads about the file size behaviour of Affinity Photo. Unfortunately things still don't quite add up for me.

I've got a 10MB NEF RAW file. I've reduced to RGB/8, history is turned off and I also used "Save As" trying to trigger the file streamlining.
Still the Affinity Photo file is 112MB.
What am I missing?

cheers,
Torsten

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I was going to ask if you'd done anything special to the file after Developing the image, but first I decided to try it myself.

My 19MB NEF file becomes a 136MB RGB-16 .afphoto file when Saved.

I then converted it to RGB-8 (Document > Convert...) and did a Save As, and the saved file increased to 144MB.

I then opened the Snapshots panel, and deleted the background Snapshot, and did another Save As. The file size did not decrease; the byte count remained identical.

I then exported as a TIFF, without compression, and got a 46MB TIFF file.

Loading that TIFF file into Photo, and doing a Save As gave my a 56MB .afphoto file (including the background snapshot).

I then decided to delete the background snapshot, and I did another Save As. Deleting the snapshot did not reduce the file size of the newly saved file. The byte count remained identical.

(All "Save As" operations were done using new filenames.)

All files are available for upload to Serif for analysis, @stokerg, if you'd like them.

-- Walt

Windows 10 Home, version 20H2 (19042.685),
   Desktop: 16GB memory, Intel Core i7-6700K @ 4.00GHz, GeForce GTX 970
   Laptop (2021-04-06):  32GB memory, Intel Core i7-10750H @ 2.60GHz
, Intel UHD Graphics Comet Lake GT2 and NVIDIA GeForce RTX 3070 Laptop GPU
Affinity Photo 1.9.2.1035 and 1.9.4.1048 Beta   / Affinity Designer 1.9.2.1035 and 1.9.4.1048 Beta  / Affinity Publisher 1.9.2.1035 and 1.9.2.1024 Beta

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