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?
This is how NFTs make me feel: like the future is useless but expensive, and world-altering technology is now in the hands of a culture so aesthetically and spiritually impoverished that it should maybe go back to telling stories around the cooking fire for a while, just to remember how to mean something.
There is something about the aesthetics of NFTs — not a sameness, exactly, but a particular deficiency of which they all partake, such that even though they look different, they all manage to suck in the same way. It’s tempting to say they suck the way everything sucks now, but it’s more like how one particular strain of American aesthetics has sucked for the last 20 years. NFTs are the human capacity for visual expression as understood by the guy at the vape store.