Extract from a thread we discussed in the Poser Python forum in February: Yet another idea. If you feel like updating your steering script, you could add some of the features offered by Vue. Basically Vibrate and Spin. Vibrate is useful for when you want your vehicle driving along a rough road, you apply vibrate, choose which axis, and the amount, and your vehicle shakes as it drives along. If you add the ability to apply this to only certain frames, then you could do the effect of the camera shaking as the train goes by, or the buidling shaking as a bomb goes off , etc. Spin is useful for when you want an object to keep spinning uniformly through an animation. You have a rock being thrown by a catapult. To make it look more realistic you choose the rock object, choose an axis, set the spin speed, and your object spins while it flies. This could be added to the gravity script, but you may want to also use it on a satelite in orbit, so it would make more sense to add it to the steering script, and it could then be run on an object after that was animated with the gravity script. This script could be useful for various things, like matrix style bullet effects, rolling wheels or balls, making siren lights turn, rotating a minigun barrel, etc. It would be easier to adjust the speed in Python that to have to keep retiming animations to make things move properly.