I am just started with Houdini and I am following this tutorial: https://www.youtube.com/watch?v=9Agq4ZOm2rc&t=294s [www.youtube.com] Because my spheres are moving extremely fast with the same settings. If $FF is hardware dependent, what expression can I use to make it basing on velocity/time, like say move 1 unit up every 1 second? (like Time.deltaTime in Unity) Many thanks!