Create a museum-quality volcanic-ash ceramic relief depicting an invented geological landscape. On one large rectangular hand-built slab, carve layered mountain ridges, lava channels, crater contours, and low-relief terrain, with inset iron-red mineral pigment and a few restrained glossy obsidian-like glaze pools. Use a landscape 4:3 near-frontal view with a slight side angle so the full composition remains clear while relief depth is visible. Raking gallery light should cast delicate shadows across incised contour lines and reveal coarse volcanic clay, grogged stoneware, matte fired surfaces, and sparse glossy glaze. Keep an austere ash-gray, basalt-black, iron-red, and pumice-beige palette with balanced asymmetrical terrain flow. No readable text, map labels, frame, hands, logos, watermark, recognizable real landmark, digital neon, or flat printed appearance.