Hi i am developing an android game. I have mesh collider on ground and fixed timestep like 0.03333333. I'm using physics material for many collider. My problem is that sometimes ground collision detection can't detect high velocity objects. I'm using Continuous Dynamic for these objects and for rigidbody extrapolate. I have tried multi box it has the problem and i need long range collision so box dimension needs to extend at least 600. This wasn't good some objects could get through planes. But collision detection was better in small objects. In broadphase detection isn't good as multibox but object's mostly doesn't penetrate. So i need information about which preferences are good for physics ,rigidbody and collider in 30 fps. I need collision detection by frame not depend on velocity. So speculative is not good for me.