Convert displacement to polygons derived from a displacement map on the mesh. You can't simply run convert displacements to polygons without first converting the mesh to a subd mesh, followed by converting the subd mesh to polygons in maya which gives you the dense geometry required, then and only then can you convert…
If you want to convert displacements to polygons, you have to convert to subd. Although converting to subd doesn't work due to an error; I read one should export the object as an OBJ, followed by re-importing as an OBJ and that should fix the problem but it doesn't. I hoping there is a script that can clean up the nodes…