One of the biggest headaches in UV mapping is not knowing if your map is stretched until you apply a checker texture. WrapIt provides a live heat-map overlay that shows vs blue (perfect) areas as you work.
: If your sculpt exceeds 20 million polygons, export a decimated version (around 2-4 million polygons) from ZBrush for Wrapit to target. This maintains visual fidelity while maximizing viewport frames-per-second. wrapit 3ds max