Out of the box, the game runs at a native resolution of 900p, admitted the firm, but patch due to be deployed "shortly after release" will up that output to full HD 1080p.
According to Ubisoft, you won't even notice. "If it [was] running at 720p vs 1080p, you're going to notice the difference, by far," said associate producer Sylvain Trottier.
"But if it's set at a resolution that's very close, where most of the pixels are already there in internal processing, most people won't see any difference," he went on to suggest.
Ubisoft explains that it shipped the game running at 900p to ensure a 30 frames-per-second refresh rate at launch.
"Finishing the game at 900p gave the development team the extra room in terms of the GPU and CPU usage to ensure the framerate never dips below 30 frames per second," explained Ubi.
"The team then used the time between the ship date and the release to focus on a title update that could deliver native 1080p resolution on the PS4."
The patch will also add "a brand-new anti-aliasing technique", which helps reduce the appearance of jagged edges on-screen.
"This anti-aliasing technique," the firm added, "will be available for both PS4 and Xbox One." There was no mention of the Xbox One version's native resolution output.
Activision and developer Infinity Ward has deploy a similar patch for Call of Duty: Ghosts on PS4 at launch, increasing the native output of its single-player campaign from 720p to 1080p.
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Source: http://www.computerandvideogames.com/438602/assassins-creed-4-ps4-update-to-up-resolution-from-900p-to-1080p/
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