You can render it out, just not with the scanline renderer. http://download.autodesk.com/us/3dsmax/2012help/index.html?url=files/GUID-02B83BCD-6621-4F0F-878B-9781A07C996-2310.htm,topicNumber=d28e449292
You can render a preview, and set it to whatever resolution you want (pretty much). http://download.autodesk.com/us/3dsmax/2012help/files/GUID-02B83BCD-6621-4F0F-878B-9781A07C996-2310.htm For the alpha, you could simply change your shaders' diffuses to white, and re-render a new preview. Then batch-combine the two videos…