LMB paint • RMB erase • Space play/pause • . step
Jamming: buried grains under load may “lock” and sleep until disturbed.
Repose & Cohesion: each granular material avalanches to its own angle (θ). Cohesion resists slumping (wet sand holds >45°).
Fluids & Buoyancy: heavy grains sink through water/brine; light grains (snow) float.
Thermo-chemistry: snow melts by drawing heat; water wets sand; salt makes brine and lowers freezing; cold water/brine freezes into ice that acts like a wall.