the core of the technique is to make smart use of distance fields. That video just don’t explain how to make the transparent material, but teaches how to make each sphere melt into each other, which is key for what you want. The asset at the store I can’t tell if is based on the same concept, even more seeing the comment section inside it Im afraid. I think you could ask @RyanB if there is something else needed, if he has some spare time he might just sent few words here.