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?
Your output depends on your input, but a lot of your input is random: you’re interested in lots of different things, and those things, occasionally, will talk to each other in your work.
Lately I’ve been thinking about being more intentional with input. Thinking about input as collage. Taking the principle of juxtaposition (1+1=3) and using that to guide your input: what weird, seemingly disparate things can you feed your brain that will come out later in a new mix?
The input collage can be subject or genre based and even better if it’s multi-media.
...There’s a balance here between feeding your brain intentionally and then backing off and letting your brain do the subconscious work of mixing your inputs together.