October 8th, 2008,10:33 AM
Sure, I always use this technique in small scenes, that is true.
But you don't really need to change materials, since you only need to export the entire scene in FBX or Obj from Max and you don't need to do anything except output the motion pass created by the scanline renderer of Nuke.
I does take time to load the first time in Nuke, but once the FBX or geo is there it is pretty fast to work. and I suggest leaving in a farm or during the night the motion pass render, don't make it in the "fly" in the comp, that is just too slow.
Just pipe a black Constant to all the geo and use the shuffle to bring the motion pass to the RGB pass of a write node.