Softimage XSI Conditional expressions.
This set is in seven parts and is about making bubbles in a fish tank. We look at spawning, controlling and terminating spheres on a spline using conditional expressions. We also look at using conditional expressions to rotate a propeller. All the driven elements are controlled by sliders and all of this without key framing!
Here is the link to the videos:http://www.barkeandmaddock.co.uk/tutorials.php