Meadow corner joints

Four independent painted edge joints. Top walkplane96; bottom edge256. Existing Meadow-only exposed-neighbor dispatch. Silent static review.

Top left, top right, bottom left, bottom right joint drawings

Actual16px tiles and magnified48px tiles, composited over the current soil/surface/cap samples:

Current terrain with painted corner overlay samples

Native roots extend beyond the original narrow sidecap. These samples require composition review; they do not change collision or terrain shape.