It would be very useful to creators of sculpty vehicles and other physical objects, if sculpted prims could have their "hollow" attribute adjusted for the purpose of reducing the prim's mass. Sculpted prims are the only prim type whose mass cannot be adjusted without changing its size, which limits its usefulness in creating vehicles. For example, consider a sculpted prim canoe. Although it looks like a thin shell that's empty inside, to the physics engine it is a large solid sphere, and so it has far more mass than it should to feel remotely realistic. I'm not asking for hollow sculpties to be rendered differently than non-hollow sculpties, just that they have the same mass as a sphere of the same size and hollowness.