If you render your 3D animation in Max, you'll want to be sure to save it in a lossless format that includes alpha channel. Quicktime animation) codec comes to mind.
You can import the model(s) into Invigorator and animate them there. However, the texturing abilities of Invigorator are not as robust as they are in Max. Invig does support UVmapping, but you'll have to break models apart by texture.