Gwenn Germain entered the professional world of animation with his graduation project: Celles et Ceux des Cimes et Cieux. It is a long feature project he co-imagined with his brother Yann Germain and for which he produced and crafted the trailer.
A young boy who lives in a village on a giant tree, falls in the depth of the forest where he meets two strange natives who will help him go back home.
Gwenn Germain spent a total of almost a year to finish with this trailer: 6 months of pre-production and 5 months of production. The art direction is highly influenced by Hayao Myiazaki, Jean Giraud, Syd Mead.