# fx(params): Parameterized Longform

**Track:** Advanced Generative Art — Advanced Creative Coding — proposed (50)
**Framework / surface:** p5.js
**Level:** Hard
**Prerequisites:** Hash → Traits → Feature Distribution

**In one line:** Typed, collector-settable params that stay deterministic.

## Theory, aesthetics & inspiration

The fx(params) standard, introduced by fxhash, extends long-form generative art with typed, collector-settable parameters—numbers, colors, booleans, selects—that live alongside the minting hash. The work becomes a parameter space rather than a single curve through randomness, and the collector co-authors a coordinate within it while determinism holds: identical inputs reproduce identical output, forever. This reframes the old tension between artist control and chance, echoing Sol LeWitt's instruction-art logic, where the rules, not the executor, are the artwork. The discipline is bounding the space so every reachable combination is intentional—an aesthetic of designed latitude, not an open sandbox. Range design is composition.