title: How do I remove air resistance?
body: <p>I have a space simulation, so obviously I don't want gravity or air resistance. Gravity was straight forward to turn off, but I can't find the equivalent for air resistance. I presume it's going to be on a body-by-body basis rather than a world wide setting like gravity.</p>
  
  <p>Indeed I see on <code>btSoftBody</code> that there are values for medium density like <code>air_density</code> but I am using <code>btRigidBody</code>.</p>