Spline interior filling?

I would like to make an array of objects based on points and pretensions of the splines.
Could someone give me a direction of the nods to be used for this?

I made an assembly in the image example.
Would you like to do something like this?

Help, please!

This is perfect, thank you !!!

You can follow the below tutorials

  1. Advanced Procedural Foliage Spawner I - UE4 Tutorials #327 - YouTube
  2. Advanced Procedural Foliage Spawner II - UE4 Tutorials #328 - YouTube
  3. Advanced Procedural Foliage Spawner III - Points Inside a polygon - UE4 Tutorials #329 - YouTube