Using convex (concave) object as particle in PhysX (3.2.0)?

I compound few convex meshes and built concave actor. The problem is that I need to simulate many exactly the same concave objects. So far I create dynamic actor and simulate but my question: Is it possible to define concave actor (shape) as a particle? Changing concave to convex or using predefined shapes is not an option.

The SDK doesn’t deal with particle shape, thats up to the application. You can only specify position, velocity, indices etc.

A particle is a point, it has no shape as far as physics in concerned. If you use particle position to drive the motion of a shape, concave or otherwise, your application will have to provide the orientation of the object.