2x2 grid, 16:9, I(0) = blank matte background. I(1) = final isometric miniature of $ DESTINATION, its landmass cut as silhouette $ SHAPE and floating as a diorama partitioned into four wedges — $ STATE_1, $ STATE_2, $ STATE_3, $ STATE_4 — with ONE continuous $ PATH flowing unbroken through all four. ∂I/∂t = Δ(I, $ DESTINATION, $ SHAPE) under a piecewise state field S(θ) that rotates through the four quadrants. Constraints: isometric projection, base-shape adherence, center-outward build order, seamless path continuity across seams, four distinct palettes/weathers meeting cleanly at the center, cross-section side walls, soft global illumination. Integration: t=0.0–0.15: faint isometric base outline in silhouette $ SHAPE, quadrant seams and a light guide grid appear. t=0.15–0.4: the central hub landmark of $ DESTINATION rises first where all four wedges meet; the $ PATH's spine blocks in. t=0.4–0.7: each quadrant fills outward in its own state — foliage, weather, lighting and tiny figures shifting per wedge — while the $ PATH threads a little traveler/vehicle through the transitions. t=0.7–0.9: edges resolve into a clean cross-section revealing strata; each wedge's outer props finalize the silhouette. t=0.9–1.0: soft shadows, small labels for each state and stop appear, global illumination settles, final polish. Output I(1) as an 8K isometric four-state journey diorama masterwork.