A wooden rake glides across a displaced sand plane, its seven tines carving cumulative grooves into the mesh vertices while curving around four immovable rocks. The sand surface blends a static ripple pattern with the raked groove depth, recomputing normals each frame for realistic shading.
- Sand mesh: 220x220 segment plane (48,841 verts)
- Rocks: 4 noise-displaced icosahedra
- Rake: 7 tines, per-vertex proximity carving
- Technique: live vertex displacement + normal recompute