[5] Grau shot his first feature, Honor of the Knights by Catalan auteur Albert Serra, at age 23.

It was screened in the Director's Fortnight section at the 2006 Cannes Film Festival alongside works by David Cronenberg, Gus Van Sant and William Friedkin.

[12] While 2011's The Awakening was met with mixed reviews, critics noted that the film "looks great" and lauded "Eduard Grau’s elegant cinematography".

[13][14] Grau lensed the music video for Lady Gaga's 2011 song Born This Way, directed by Nick Knight.

Grau also worked on campaigns for brands including Adidas, Apple, Gatorade, Nissan and Volkswagen.