Drawing connectors between every pair of overlapping circles would probably work. There’s an illustration of that on the reference page they linked to: http://s

Drawing connectors between every pair of overlapping circles would probably work. There’s an illustration of that on the reference page they linked to: http://shspage.com/aijs/en/#metaball http://shspage.com/aijs/en/#metaball EDIT: I don’t think this would be a mathematically accurate metaball though, but it looks alright. No point would be influenced by more than two balls if you just connect them pairwise, and as far as I understand, in real metaballs any number of balls can influence a single point.