I love making movies that include motor vehicles. Unfortunately iClone's support for animating vehicles has always been limited and/or not user friendly, which has become a major obstacle for me.

What I want to be able to do, is realistically animate vehicles. Have the vehicle follow a path predictably. Be able to release the vehicle from the path without the vehicle then moving from the point where it is released. Ability to have front steer wheels pivot on corners, suspension moving with the terrain, motorbike leaning into corners etc. I would also like to see some means of realistically animating an articulated vehicle. Eg a truck towing a trailer. Have the ability for the trailer to pivot from the tow point as the truck turns and then follow the truck.

V5 had support for PhysX which offered some (albeit rather clumsy) of these features/support for animating vehicles. However later versions of iClone dropped support for PhysX. It can still be used in a limited capacity, but is difficult to control and has very unpredictable results, which can be impossible to work around.