In November 2018, the trailer for his debut feature film Guava Island starring Donald Glover and Rihanna premiered at the Pharos Festival in New Zealand as he collaborated with Donald Glover once again.Guava Island was released on April 13, 2019, by Amazon Studios through Amazon Prime Video. On Rotten Tomatoes, the film has an approval rating of 77% based on reviews from 26 critics, with an average rating of 6.46/10. On Metacritic, it has a weighted average score of 65 out of 100, based on 6 reviews, indicating "generally favorable" reviews.
After graduation, Murai turned to freelance work as the director of photography for numerous music videos, as well as VFX and storyboarding, most notably for Ace Norton. After some time Murai began to direct low budget films.