Add some comments, use the clipbox param to clip
Add some comments, use the clipbox param to clip

though the example doesn't create any spheres crossing the boundary that
need to be clipped anyways.

MengjiaoH/ospray,ospray/OSPRay,wilsonCernWq/ospray,ospray/OSPRay,MengjiaoH/ospray,MengjiaoH/ospray,wilsonCernWq/ospray,MengjiaoH/ospray,ospray/OSPRay,wilsonCernWq/ospray,ospray/OSPRay,MengjiaoH/ospray