According to a Variety report, HBO will fix the visual effects mistake in Episode 3 of House of the Dragon that came out on Sunday, September 4.
The House of the Dragon error was first spotted by an eagle-eyed Twitter user, Sarah Capps. It involved the Paddy Considine character, King Viserys I Targaryen. In the scene, the king hands over a letter to a soldier. However, his fourth and last fingers are visibly wrapped in green gloves.
The king had been suffering from an undisclosed illness since the series began. In an earlier episode 3 shot, his fourth and fifth fingers appeared rotten suggesting that his ailment had worsened. Consequently, the green fingers in this particular scene suggest that an artist forgot to edit the fingers.
The gaffe resulted in a massive uproar on the internet as Game of Thrones suffered from a similar mishap. In the fourth episode of the final season, audiences noticed a Starbucks cup at a table in front of Daenerys Stormborn, portrayed by the ever lovely Emilia Clarke. HBO eventually acted on the issue and edited the object out, but it was too late - it had become a meme.