Intersection / Hit / In-Out-Volume Test between Objects and Particle Shapes

[tyFlow]

You can give the particles a PhysX Shape, use a PhysX Switch to set them to "kinematic" (so they are part of the sim but don't collide or have PhysX dynamics applied), then use a PhysX Collider op to test their collisions (ie intersections) with whatever geo you want (make sure the PhysX Collider mode is set to Mesh if it's not a convex surface). The final step to get this working is to go into the tyFlow's PhysX settings and enable "kinematic collision pairs".