 Age of Empires III builds on and introduces new features to the Age of Mythology engine , called Bang ! Engine . One new feature is the inclusion of the Havok physics simulation middleware engine on the Windows version and the similar PhysX engine on Mac OS X. This means that many events such as building destruction and tree falls will not be pre @-@ created animations , but will be calculated according to the physics engine , in an innovation for the series . Other graphical features of the game include bloom lighting and support for pixel shader 3 @.@ 0 . 
