https://wccftech.com/insomniac-rejects-spider-man-downgrade/

As usual with basically every major game release since Watch_Dogs back in 2014, a ‘graphics downgrade’ debate sparked on the Web surrounding Marvel’s Spider-Man, the PlayStation 4 exclusive due on September 7th worldwide, with a few fans inquiring with Insomniac and Community Director James Stevenson about these graphics changes.

According to Stevenson, who spoke with his engineers and artists colleagues at Insomniac before addressing the fans in the following series of tweets, the reason for these graphics changes is to be found in a combination of art changes (such as the reduced number of puddles in that scene and the different lighting due to the Sun’s position having been moved around) and “aggressive” video compression resulting in crushed detail for that video. However, no actual level of detail has been diminished – thus, no downgrade at all in the final build.