There is the Alternativa3D 5.5.0 update on the site.

Changelog:

• Added mouse interaction. Objects of the classes Object3D, Surface and Face can now dispatch 3d mouse events
• Added property View.interactive
• Added a new class Sprite3D
• Added new materials: SpriteTextureMaterial and DevMaterial
• Properties alpha and blendMode of the SurfaceMaterial class are moved to the base Material class
• Renamed following methods of the View class and changed their signature:
  • getFacesUnderPoint -> getObjectsUnderPoint
  • getFaceUnderPoint -> getObjectUnderPoint
• Added controlled clipping in Camera3D
• Added unload() method in classes Loader3DS and LoaderOBJ
• Loader3DS and LoaderOBJ can now load transparency maps
• Added method Scene3D.hasChanges()
• Added methods for coordinates transformation:
  • Object3D.localToGlobal()
  • Object3D.globalToLocal()
  • View.projectPoint()
  • View.get3DCoords()
• Method Object3D.getChildByName() can now perform recursive search in all child objects
• Added property Object3D.transformation, which returns global transformation matrix of an object
• Fixed bug in the method Scene.drawBSP(), which occurred when there was a texture material without texture
• Fixed bug in texture rendering when UV-mapping is degenerated
• Fixed bug in the method Mesh.removeFace()
• Fixed bug in controllers, which occurred when coordinates of a controller were being set without any object assigned
• Fixed bug in the methods View.getFaceUnderPoint and View.getFacesUnderPoint, which led to incorrect results when view had transformation
• Fixed bug in the LoaderOBJ class, which occurred when the load() method was called twice
• Fixed bug in the method ObjectUtils.getClassName(), because of which names of the base Flash classes were incorrect