is it me or these thread is dead? i was able to solv some of my problem like pick objects using joints which leaves me with one last problem which is collision according to it's shape like a chair and other objects. I checked the compound collision code but i made a funny physic as a whole object. Not shure if it's juect the mass i set. I don't even know what unit that mas is set. I just set the mass on newton_addentity according to size like small objects starts with 10 mass and add more as i add bigger object.