k3d/share/shaders/k3d_volcube.sl:210:    vector step_cur     = vtransform("object","current",step_obj);
k3d/share/shaders/k3d_volcube.sl:222:    point  Pcur        = P  + jitter * step_cur;
k3d/share/shaders/k3d_volcube.sl:297:	Pcur += step_cur;
