Start here:
VA 3D Designer Video1 Tutorial Series DCC to Unity3D Units
Video 1 from its VisualActor as a 3D Designer series Match your Units between your DCC , Unity and VisualActor
- You will learn to setup the units of your DCC programm
- Make sure all your importet CAD models will have the same size ratio
- 3Ds Max and Blender Examples