Using a magnet sop, how would I make the effect it generates stick rather than dissipate as it moves further away? Is there a simple switch?

Say I wanted to create a comet for example and use a meta balls weight coupled with a magnet to create a rut following its trail to impact with the ground. It seems like that would be a good way of doing it?

Try the Solver SOP. Here's a footprints tutorial that should help explain the concepts: https://vimeo.com/40157341 [vimeo.com]

Ah that was perfect, thanks. :!: