Greenwood was born on the Indian Ocean near the shores of South Africa, as a son of a Colonel of the British Army and a Flemish painter. His parents took him to explore the world and he got to grow up in places such as Johannesburg, Cairo and Moscow. From a very early age, he made detailed illustrations of the energetic world that he witnessed during his journeys.

He committed himself to be a genuine storyteller and a fervent observer of mankind. His work can be described as story-driven with a distinctive visual style, combined with a keen eye for subtlety and detail, strengthened by underlying emotions. Whilst always capturing the grace in reality, he puts the highest standards onto himself and onto his work. 

Greenwood has made films all over the world, from Africa, across Europe, to the USA and Japan.