• sandy.data.Vector class has been renamed to sandy.data.Point3D in 3.1 to make Sandy compatible with Flash player 10 compilers.
• World3D class has been removed from the official package. Now prefer the use of Scene3D class.
• Shape3DEvent target property now is the bubble event broadcaster. To get corresponding node, you have to do , myEvent.target.target

• ZshaderMaterial has been removed from the official package

Now you need to implement the IRenderable interface and implement your own rendering process.

Signature of update, cull, render and display method has also changed, simply check the documentation to get methods prototype.