the display in spine-as3 is tricky,since example SpineBoy doesn't have mesh region.so the as3 version runtime ignore the part.I think one of the reason is using 2d api to present transformed mesh is very difficult.but since the new api in flash 10 can draw triangles use uv ,things would be easy,please have a look.
http://help.adobe.com/en_US/FlashPlatfo ... Triangles()
i hope i dont have to rewrite a whole project just becuz a spine animation couldn't show on the user interface.
