HDRI is changing the face of 3d because it is easy to use and the results are stunning. A 'high dynamic range image' is cutting edge technology that attepts to recreate digitaly the breathtaking lighting of the real world. Our HDRI are captured on professional equipment and are the best you will find anywhere. Included is a full 360 degree by 180 degree panoramic of San Francisco taken from the street level. Any sign of the tripod has been removed and the picture is completly seamless. A 4000x2000 pixel .hdr, a 4000x2000 jpg and a ULTRA HIGH RES 8000x4000 jpg image is included.