Posted by Paleface on June 01, 2016 at 16:38:24 EST in reply to Seems like it would be hard to get something like this to happen accidentally. Could it have been intentional? Maybe they thought it would make the animation look smoother. Also, they left scanlines on by default. ; ) (n/t) from Paleface.
Ah yeah they did do it on purpose: "Code Mystics Inc. (@CodeMystics) tweeted at 5:55 PM on Thu, May 26, 2016: @omrunl there's interframe blending to get rid of the flickering shadow. Flickers are not allowed in modern games for e.g. photosensitivity." They added later that "if allowed" they would add an option to disable it. Also I hear the Vita version got patched already, not sure what for exactly.
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