A plate with a grid of circular pores whose radii are driven by the Voronoi edge-distance field. Pores deep inside a cell open up (large radius); pores near a cell boundary stay small — producing organic clustering and flow without explicit zoning. Uses `@GridXY` for placement, `@VoronoiEdgeMetric` for radius, and `@Clamp` to keep values in a sensible range.
