Joel Osis takes a look at one of the reasons for using FBX in Action, showing how you are able to use an FBX model to create a 3D Depth of Field Effect in Smoke or Flame.
a look at one of the many reasons to use fbx in action
Joel demonstrates how to extract Z-Depth from the FBX model, and provides some tips for getting a good matte for using with the Depth of Field Node.
Joel notes that one of the best things about this technique and workflow is that you don’t have to keep going back into 3D. Check out the tutorial for using FBX in Action here.