If this is a destructible environment, they would need to store interior details to render exposure in any real application. Animation is very hard. Mathematic

If this is a destructible environment, they would need to store interior details to render exposure in any real application. Animation is very hard. Mathematics can help here, but the results look unnatural and fairly shoddy (see the building doing a simple sinusoidal based sway in their video). The problem is essentially one of scale. With polygons, we only need to animate the vertices. With this, we need to animate every voxel. This presents massive opportunities, however also massive challenges both for the machine performing the computations and also the software engineers trying to get realistic animations.