No.31585
Artists usually include them so you can rebuild variants or sometimes include the uncensored layers in it.
Sometimes it's just as you said and it's not even higher resolution, just bigger because of the raw format. Think of it as gigabyte-tier timelapses. Hoarders will save everything either way so it's up to you.
No.31587
>>31585Can the latest Photoshop version see all of the layers or do you need to use the same Photoshop version that was used to create the PSD file?
Why are PSD files so large? I used magick convert to extract all of the layers from a PSD file that was 90 MB and the extracted files amounted to less than 20 MB, then I crushed it to 13 MB with JXL lossless transcoding.
No.31594
>>31587I think you need the same version to not get fucked up layer trees/version-specific settings which makes it even more annoying. The size mostly comes from redundant raw layers but some artists fuck it up and use lossy formats, making lossless compression useless…
>>31589I miss the days when thousands of lossless pictures actually weighed less than 1.44MB. Current technology allows us to decently upscale the really small ones too.
No.31611
I take that back about extracting images. Not everything gets extracted and what you do extract will often look differently.
It's better to just compress it into 7z with max settings, I compressed 3 PSD files about 500 MB total to 120 MB.