Derived Play: Contour Sandbox League

Create a wide 16:9 original derived-play concept scene titled "Derived Play: Contour Sandbox League".

Purpose: derive a playable image-prompt game from the sand-table use-case idea, but make it a distinct rules object: a competitive kinetic-sand terrain arena with molded pieces, survey gates, scoring beads, change-boundary fences, light pegs, and crop frames. Do not make a 2x3 board, card spread, poster, patchbay, projector, planetarium, loom, printshop, weather station, film stage, pinball table, route-map board game, glass-slide apparatus, or arcade cabinet.

Scene format: close diagonal view of a shallow wooden sandbox arena on a clean studio table. Players are absent. The arena contains sculpted dunes and ridges, removable molds, vellum fences, brass pins, transparent crop frames, shadow sticks, tiny fictional sign stakes, score channels, and colored beads. All labels, symbols, places, objects, and organizations are fictional or absent.

Six derived play modes should be visible as mechanisms on the same terrain arena, each with a short readable label:
1. "ridge draft" - draw terrain molds and place them to convert a prompt into foreground, middle, and horizon layers.
2. "fence veto" - protect most of the scene by fencing the single zone allowed to change.
3. "mold memory" - reuse a landmark mold for three turns and score preserved silhouette identity.
4. "shadow wager" - place a sun peg, then judge whether all tiny shadows agree with the declared light source.
5. "frame squeeze" - slide icon, square, poster, and banner frames over the same terrain without losing the subject.
6. "sign whisper" - score tiny invented sign labels only when they remain readable and rights-safe.

Visual language: tactile premium tabletop prototype, kinetic sand, thin birch walls, matte ceramic molds, translucent survey frames, brass sun pegs, teal/coral/yellow scoring beads, crisp engraved icons, playful but calm. It should read as a real playable sand-sculpting rule system, not a diagram or ordinary board game.

Composition: the sandbox arena fills the frame from lower left to upper right; the six mechanisms are connected by sand ridges and bead score tracks. Use shallow depth of field only lightly so the components remain legible.

Safety and originality constraints: original concept and prompt; no external prompt, article, image, artwork, repository, or case-study source reused; all entities, marks, characters, places, labels, and institutions are fictional or rights-safe; keep the content non-political, non-adult, non-graphic, non-harmful, and free of real brands, celebrities, copyrighted characters, living-artist style imitation, and watermarks.

Avoid showing: underwater sonar, bathymetry screens, portholes, signal patch cables, oscilloscope panels, transparent slide projectors, celestial star maps, hanging mobiles, printing presses, weaving looms, weather gauges, film sets, arcade cabinets, tabletop card layouts, six rectangular panels, route-map game boards, and pinball scoring tables.