@Override
 public MovingObjectPosition collisionRayTrace(Vec3 startVec, Vec3 endVec) {
   Block block = new Block(Material.rock);
   // It's possible for the startVec to be embedded in a lump (causing it
   // to hit the opposite side), so we must move it farther away
   Vec3 d = startVec.subtract(endVec);
   double scale = 5.2; // Diagonal of a 3³. (Was initially using incrScale = 2)
   // This isn't quite right; the dVector would properly be normalized here
   // & rescaled to the max diameter. But we can survive without it.
   // Unnormalized length of dVector is 6m in surviavl mode IIRC. This'll
   // be way longer than it needs to be.
   // Why is it + instead of -? Hmm.
   startVec = startVec.add(SpaceUtil.scale(d, scale));
   MovingObjectPosition shortest = null;
   for (int i = 0; i < parts.size(); i++) {
     ClayLump lump = parts.get(i);
     lump.toRotatedBlockBounds(this, block);
     MovingObjectPosition mop = block.collisionRayTrace(worldObj, pos, startVec, endVec);
     if (mop != null) {
       mop.subHit = i;
       if (shortest == null) {
         shortest = mop;
       } else {
         Vec3 s = shortest.hitVec;
         Vec3 m = mop.hitVec;
         s = new Vec3(s.xCoord, s.yCoord, s.zCoord);
         m = new Vec3(m.xCoord, m.yCoord, m.zCoord);
         startVec = startVec.subtract(s).subtract(m);
         if (m.lengthVector() < s.lengthVector()) {
           shortest = mop;
         }
       }
     }
   }
   return shortest;
   // return super.collisionRayTrace(w, pos, startVec, endVec);
 }