There is a displacement node now in SuperFly.  How well it works is a matter of opinion.  It may do what you want or maybe not.  Below are two pictures the first one is a Preview of 4 Poser Sphere's at Sub D of 1, 2, 4 and 8.  The second picture shows how the pattern is displaced.  For a snowbank it may be ok.  For super fine detail probably not.

Poser 5, 6, 7, 8, Poser Pro 9 (2012), 10 (2014), 11, 12, 13, 14