How to Generate splines in real time? Like GTA 5 gasoline trail

Thanks for the prompt response Everynone, looking at the blueprint it is very similar to what I have, only the indexing is slightly different, which is where I have probably gone wrong. I will try this out later tonight.
The mesh/collision side of things is fairly straight forward as you’ve pointed out.
I did find an article similar to what I want to achieve as part of the second part of this ability when the spline overlaps and creates a closed loop it forms the shape inside, like the image attached. I’ll work on this and if I get it running, I’ll post my results. Thanks again!