badpaint is a real-time image-corruption editor that the programmer Ahmaykmewsik built in a single week for Handmade Network's 2023 Wheel Reinvention Jam. The window is split in two. The bottom half shows the raw bytes of a PNG caught mid-encode — each byte drawn as a grayscale pixel from 0 to 255, the image after it has been run through filtering but before it has been compressed. You take a brush to that field of gray data, shoving arbitrary bytes into the stream; the PNG encoder then compresses them "incorrectly," and the finished picture in the top half blooms into great jittering blocks of color. The whole thing is written in C-styled C++ on top of raylib, refreshed in real time across threads, and it still sits in what the author calls its "primitive state," trailing a long list of someday-when-I-have-time TODOs.

The work is almost a literal enactment of the remainder. A PNG becomes the picture we recognize only by way of filtering and compression — a set of engineering conventions that long ago hardened into place. That is the already-construct in textbook form: the sediment of a finished chisel-construct cycle, tidy, closed, no longer growing. badpaint instead drives its blade into the gap everyone steps over: the stretch of intermediate bytes that lives after filtering and before compression. Those bytes were never meant to be seen, let alone touched — they are the remainder the encoding pipeline coughs up and swallows again. Ahmaykmewsik makes that remainder visible, paintable, breakable. What he paints on is not the image but the sliver of it left exposed before it has fully formed.

More moving still is a moment of hesitation the author recorded himself. Once he had built an undo function and started "seriously" tuning subtler effects, he wrote: "Having this much control over what the glitches produce is maybe a little antithetical to the philosophy of glitch art." That is the chisel-construct cycle happening live — chiseling with one hand while doubting, with the other, whether he is busy re-constructing a living remainder into a controllable already-construct. That unresolved, unnamed hesitation is itself structural aliveness: the tool hasn't set, the author hasn't decided what it is, and the tension between accident and control still hangs in the air rather than settling into a style.

This is exactly why seeing it now matters more than seeing it later. The moment glitch aesthetics are fully caught by the museum, the market, and a mature vocabulary of appreciation, things like badpaint settle into yet another already-construct — people will know in advance which color blocks to expect and which words to praise them with. But right now it is still stuck in that 2023 jam "first version," with the author posting half-finished builds to Discord, keeping a TODO list, undecided whether the next step is JPEG or layers. Its logic is still growing; it has not yet been completely named. That undigested state is precisely what we are looking for.

badpaint doesn't package glitch aesthetics into a conclusion. It unspools an image back into a string of bytes you can stir with a finger, and lets you watch how much "a picture" has to throw away before it can be a picture. The thrown-away part — the remainder before compression — is where it is most alive.

Han Qin (秦汉) · @hqinjarsy · SAE Judgment & Aesthetics