Figure 1: Simulated focal images in a densified 27-element interferometer, combining 10m telescopes along a 1km ring. top, from left: entrance pupil and densified exit pupil. below: Fizeau and densified-pupil images of a sextuple star. The shrunk diffraction envelope in the latter reduces the field (the outermost star is at the edge of the usable field), but concentrates the energy otherwise spread among side-lobes extending far beyond the frame borders at left. The concentration makes the image at right 10,000 times brighter.