In certain conditions, the white walls at home take on the character of a light box. In traditional Japanese architecture the intensity of atmosphere has a lot to do with the way natural light is filtered through the shoji paper panels, suffusing the interior spaces with subdued light, calming the spirit and sharpening the senses.
In optics, a caustic is the envelope of light rays reflected or refracted by a curved surface or object, or the projection of that envelope of rays on another surface. The caustic is a curve or surface to which each of the light rays is tangent, defining a boundary of an envelope of rays as a curve of concentrated light.
A piece of milled plexiglass acting as a projecting lens; via the Computer Graphics and Geometry Lab at the École Polytechnique Fédérale de Lausanne
New milling techniques applied to glass and plexiglass panels could be used to “create windows that are also cryptic projectors, summoning ghostly images from sunlight.”
[Pauly and Bompas] hope that the technique will be used in architectural design, to create windows that mould sunlight and throw images or patterns onto walls or floors,” which, if timed, milled, and manipulated just right, could produce a slowly animated sequence of images being projected by an otherwise empty window during different times of day.
To control the shape of a caustic pattern generated by a specular or refractive surface, we need to solve the inverse problem: how can we change the surface geometry, such that incident light is redirected to produce a desired caustic image?
I used to be very interested in the fact that anything, no matter how rough, rusted, diffy, or otherwise discredited it was, looked good if you set it down on a stretch of white cloth. Because anytime you set some detail of the world off that way, it was able to take on its true stature as an object of attention.
The neurons that do expire are the ones that made imitation possible. When you are capable of skillful imitation, the sweep of choices before you is too large; but when your brain loses its spare capacity, and along with it some agility, some joy in winging it, and the ambition to do things that don't suit it, then you finally have to settle down to do well the few things that your brain really can do well - the rest no longer seems pressing and distracting, because it is now permanently out of reach. The feeling that you are stupider than you were is what finally interests you in the really complex subjects of life: in change, in experience, in the ways other people have adjusted to disappointment and narrowed ability. You realize that you are no prodigy, your shoulders relax, and you begin to look around you, seeing local color unrivaled by blue glows of algebra and abstraction.
The problems themselves, though they once obsessed you, and kept you working late night after night, and made you talk in your sleep, turn out to have been hollow: two weeks after your last day they already have contracted into inert pellets one-fiftieth of their former size; you find yourself unable to recreate the sense of what was really at stake, for it seems to have been the Hungarian 5/2 rhythm of the lived workweek alone that kept each fascinating crisis inflated to its full interdepartmental complexity.
Why can't office buildings use doorknobs that are truly knob-like in shape? What is this static modernism that architects of the second tier have imposed on us: steel half-U handles or lathed objects shaped like superdomes, instead of brass, porcelain, or glass knobs? The upstairs doorknobs in the house I grew up in were made of faceted glass. As you extended your fingers to open a door, a cloud of flesh-color would diffuse into the glass from the opposite direction. The knobs were loosely seated in their latch mechanism, and heavy, and the combination of solidity and laxness made for a multiply staged experience as you turned the knob: a smoothness that held intermediary tumbleral fallings-into-position. Few American products recently have been able to capture that same knuckly, orthopedic quality.
It was one of those good rides, where the motion of the train is soothing, and the interior temperature pleasantly warm but not hot. I imagined the subway car as a rapidly moving load of bread. The motto "You can taste it with your eyes" occurred to me.