Avengers: Endgame contains a minor Thanos error, according to VFX artist - CNET

Josh Brolin plays Thanos in Avengers: Endgame.

While the team arguably vastly improved the visual effects for Marvel's big bad Thanos after his first appearance in 2012's The Avengers, keen-eyed (read: nitpicking) fans pointed out a slight error in his latest and last appearance in Avengers: Endgame.

I wish we caught it at the time," said Aitken, who also oversaw the climactic Avengers battle with Thanos (played by Josh Brolin) in Avengers: Infinity War.

Avengers: Endgame was nominated for best visual effects at the most recent Oscars, but lost to war epic 1917