Rigid Body Interaction for Large-Scale Real-Time Water Simulation

Figure 7

Top view of an aliasing problem. A body (dark gray) is staying in a stable current. Arrows show the flow between cells. The blocker slightly moves to occupy a new cell (light gray), causing the red flows to instantly become blocked. Cell now has much more inflow than outflow, which causes a sharp peak in the surface before the flows settle down to a new equilibrium (on (b)). Similarly, the surface in will suddenly drop. Both of these cause large waves to emanate from the area.

(a)

(b)