Cannot spawn the right particles on interaction with the materials

Hi all, I’ve problems spawning the right particles on interaction with materials that have physics materials. I have a master material and created various instances of this master material. Each instance has the required physics material assigned to it. On interaction with the meshes where I have these materials assigned, I only spawn particles that are assigned in 0th element of the LOD 0. I don’t know what is causing this problem. The collision I’ve assigned to these meshes are all done manually, meaning I used box colliders and resized them to fit as per my needs, on the other hand if I set the collision complexity in the static mesh persona to Complex to simple, the right particles spawn upon interaction.

I don’t know what I am missing.


I’ve decided to go with the Complex as simple collision as I understand box collisions aren’t really good with physics materials for a mesh that has multiple materials.