Starting from a layout ( below right ) supplied by environment artist Antoine Goncalves , I completed the matte painting ( below left ) in Photoshop . I simply stretched textures in 2D , fitting accurately to the wire silhouette of the reference (This would later ensure a perfect match between 2D and 3D ) . I used my custom brushes to add details like windows on the walls , torches , small rocks , plants , clouds , etc … Goncalves reprojected the result in the layout scene , inserted additional cg monks walking on a trail and vegetations before rendering the final shot in wich the camera slowly elevated over the cliff to reveal the castle .