Dynamics examples include objects bouncing down stairs. But Softimage can also apply dynamics effects to articulated chains, simulating effects such as a telephone line, curtain, or kite tail blowing in the wind. Dynamics can be combined with keyframing and inverse kinematics. Physical properties that can be assigned to an object or chain include mass and density, elasticity, and static and kinematic roughness. The Joint Properties command allows you to assign friction to each joint in an articulated chain.
Collision detection is specified on a per-object basis.
You can define an object's collision shape as bounding boxes, planes, spheres, or actual shape. But you can go beyond humorous to graceful effects such as a falling leaf. Quickstretch applies a flex, stretch, or yield deformation based on an object's linear or rotational velocity or acceleration. Flex deformation makes an object bend in the direction of motion like it is resisting wind or water. Quickstretch deformations can be added together, but cannot be combined with other deformations such as lattices.