Ok, first i made this mod, and i forgot to put everything on Mass: 0, so i remade it, and i put some objects inside of another, so i remade it, and this time everything just dissepears... every object dissapears, only thing left is floor and dollies. what am i doing wrong??
i think what he wants to do, is to make an object float, if it is so, when you are in the world bulder, press "F" and check the stactic box, so it becomes green, and voilá, the oject floats now!