First of all, a client provides a CGI studio with a detailed brief. Then, 3D artists start working on a 3D model of a building and its surroundings. After that, they set the lighting and apply textures to all the objects in the scene. And, finally, they render the images and refine them to perfection with the help of post-production techniques. On each stage, a customer should review the results to ask for corrections if needed.