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Reportedly from TMZ:

Game of Thrones is now on its 8th and final season, however, as viewers watch the face off against the Army of the Dead at the Battle of Winterfell, viewers say they feel like the latest episode was too dark! 

First, Fabian believes the pixelation and muddy dark colors fans saw on their TVs and mobile devices are due to HBO’s compression of the episode … which leads to poorer visual quality. This is made worse if it’s being viewed on a streaming service with a weak connection … or in a room that’s too bright.

As Wagner puts it … “[GoT] has always been very dark and a very cinematic show” and should be watched in a dark environment. Ideally, this means viewing it like you would a movie — in a dark theater.

The cinematographer says the showrunners and director wanted the episode to be dark. Wagner says the battle scenes were intended to be intense, claustrophobic and disorienting — like they would be in real life — but not confusing.

Fabian says, “We tried to give the viewers and fans a cool episode to watch,” and he believes they did, adding … “I know it wasn’t too dark because I shot it.”