Answered
Increase maximum image size? [2018]
Why is the maximum image size 300,000px x 300,000px?
Can I increase it beyond 300,000px x 300,000px?
Here are the official limiitations:
"PSD limits pixel dimensions to 30,000 x 30,000 and max size to 2GB.
PSD files are limited to 2 Gig because of the file format design and compatibility with other applications. That really cannot be changed.
That's why the PSB format was created, to allow for much larger files (in pixel dimension and total file size).
300,000 x 300,000 and 4 exabytes, which modern hardware does not touch.
PSB files work up to around 4 Exabytes, and we can't go beyond that without changing the OS file APIs to allow more then 64 bits for the file size and position."
Chris Cox (who was the senior engineer on Ps for 20 years).
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