Trigger Zones along Spline Mesh

[_Aka_]

Hi

It depends on what makes your mesh concave:

• If it is because the Cross shape is, then generate another mesh with a convex cross shape (a rectangle for example).
  

• If it is because your Path spline has turns, then this might help:
  • In Shape Extrusion, Set Optimize to True, and reduce the Resolution/Angle Threshold until you have a minimal but acceptable mesh
    
  • In Volume Mesh, Set Splt at true, and Split Length to something really small. Since splitting always happens at existing vertices, such small Split Length value will basically mean that each part will be defined by two consecutive groups of vertices. Basically, the part will have no turns in it, and will be thus convex.
    
  
  

I hope this helped. Please let me know if it worked.
Have a nice day.