By Michael Webb
You are lying on your back, gazing at an intensely blue sky. Any Angeleno can do that, but a lucky few will start the experience in James Turrell’s Perceptual Cell at LACMA. There, in your own private spaceship, the sky will darken and explode, in vibrating patterns of color and light that fill your field of vision. You are absorbed into this magical illusion and you lose all sense of time. And then, all too soon, the expanse of blue returns and you slide out of the capsule and are back in the everyday world.