Passage: The artwork was created by their associate, George Hardie.  Hipgnosis offered the band a choice of seven designs, but all four members agreed that the prism was by far the best. The final design depicts a glass prism dispersing light into colour. The design represents three elements: the band's stage lighting, the album lyrics, and Wright's request for a "simple and bold" design.  The spectrum of light continues through to the gatefold – an idea that Waters came up with. Added shortly afterwards, the gatefold design also includes a visual representation of the heartbeat sound used throughout the album, and the back of the album cover contains Thorgerson's suggestion of another prism recombining the spectrum of light, facilitating interesting layouts of the sleeve in record shops. The light band emanating from the prism on the album cover has six colours, missing indigo compared to the traditional division of the spectrum into red, orange, yellow, green, blue, indigo and violet.  Inside the sleeve were two posters and two pyramid-themed stickers.  One poster bore pictures of the band in concert, overlaid with scattered letters to form PINK FLOYD, and the other an infrared photograph of the Great Pyramids of Giza, created by Powell and Thorgerson.The band were so confident of the quality of Waters' lyrics that, for the first time, they printed them on the album's sleeve.

Question: Who made the artwork for the album?
George Hardie