Rokeby Venus of her body. The composition mainly uses shades of red, white, and grey, which are used even in Venus's skin; although the effect of this simple colour scheme has been much praised, recent technical analysis has shown that the grey sheet was originally a "deep mauve", that has now faded. The luminescent colours used in Venus's skin, applied with "smooth, creamy, blended handling", contrast with the dark greys and black of the silk she is lying on, and with the brown of the wall behind her face. The "Rokeby Venus" is the only surviving nude by Velázquez, but three others
David Rokeby some off-the-shelf, some rare and esoteric, and some cooked up by Rokeby himself. Initially, in 1982, much more of the system was homemade. His circuitry, designed to speed up the response of the sluggish Apple II, was still not fast enough to analyze an image from an ordinary video camera, so he built his own low-res device: a little box with 64 light sensors behind a plastic Fresnel lens. But Very Nervous System has been evolving for 13 years, during which time the world has seen any number of technological revolutions. So Rokeby now has a lot more store-bought components