Sergey Kolesov is a concept artist based in Lyon, France, and currently working as senior concept artist for Arkane Studios.
Kolesov juxtaposes passages of low and high chroma color, and makes use of textures and patterns to give his images a rich surface.
You can see see of his professional work on his Behance portfolio, though the majority, and much of the work on his blog, appears to be personal projects, in which he is having fun and indulging in the textural qualities of his digital brushwork to an even greater extent.
Kolesov has generously made some of his Photoshop brushes available for download on his blog, and on Digital Brushes.
You can find more of his work on CGSociety and ArtStation, and some of his demo videos on Vimeo and YouTube.
There are prints of Kolesov’s pieces available on InPrint.
Demo videos on Vimeo