The colored lights in the Star Gate sequence were accomplished by slit scan photography
of thousands of high-contrast images on film, including op-art
paintings, architectural drawings, moire patterns, printed circuits, and
crystal structures. Known to staff as "Manhattan Project", the shots of
various nebula-like phenomena, including the expanding star field, were
colored paints and chemicals swirling in a pool-like device known as a
cloud tank, shot in slow-motion in a dark room.