I used BEPUphysics for my XNA 4.0 game , the problem is that I load my model.fbx from into the game then add it to the space of physics engine , but when I change the scaling matrix of my Model then collision did not work , if I keep model scale the same then my model response to collision and every thing look good !
some says to me that your collision shape (it's often box ) that bound your model have to be changed also if the Model changed ? is this true ? (If yes !!! what is this ????)