M | Model Element (T+ Model) | A Three Plus Model, Mesh, or Brep
Nm | Normal Map (Bitmap) | The texture to create a bump map. The black and white values map to the perceived depth in relation to the lights. Bump doesn't actually affect the geometry of the object, only the lighting. If a normal map is defined this will be ignored. (A System Drawing Bitmap or full filepath to an image.)
S | Scale (Number) | How much the bump map affects the material 0-1.
M | Model Element (T+ Model) | The updated Three Plus Model Element
