Converts an nParticle object to a polygon mesh, which you can treat like any other polygon.
After your nParticle object is converted to a polygon object, Maya hides the nParticle object. This reduces simulation time and makes it easier to see how your Output Mesh attribute adjustments affect the mesh. To make the nParticle object visible, in the Object Display section of the nParticleShape node Attribute Editor, turn off Intermediate Object.
See nParticle output meshes and Convert nParticles to polygons.