Sylvain Sarrailh is a French illustrator, concept artist and environment designer working primarily in the gaming field. He has worked with companies like Guerrilla Games, Illumination Entertainment, Rocksteady, Amplitude, Sony Picture Animation, Ubi Soft and Dreamworks.
Given the dark and grungy vein of illustration common within that industry, Sarrailh (who also goes by the handle “Tohad”) has an unusually bright and often naturalistic approach.
He has recently become the director and designer of a new game project, Forest of Liars, and he points to the painters of the Hudson River School of painting as inspiration for his approach to the illustrations for that game’s environments.
His ArtStation portfolio can be sorted to feature that project as well as other genres in which he works. There is an ArtStation blog with updates. You can also find his work on Behance and deviantART.