[KaoruAoiShiho]

These are generally only used for the visual effects, you still need these features to make the visual effects look good.

[maccard]

> Broad Phase, Contact generation, Shape and body management, Constraint solver

These are absolutely not only used for the visual effects, they are the fundamentals of a physics engine.

[KaoruAoiShiho]

The physics of the visual effect.