I had some suggestion from my friend who works in 3d amx, He said that to export as AI files which they willbe supported by flash, What do you think?? Give me a discussion or if you want to talk about it you can enter this icq number
You can only export to ai files if you only use spines.
If you want to use any other method... which most likely you will, you can get either Illistrate!, or Vecta 3d to export into swf files. Neither support shading, but they do a good job.
If you want the texture shading, you can export a .3ds file from 3d studio max, then import into Vecta 3d standalone, or Swift 3d. They will export swf files with full shading. I would recommend Swift 3d over Vecta 3d anyday.