Basic parameters

• Use World Units: toggle
  Change whether parameters are measured using real world units or not. This modifies which parameters are available.
  • If Use World Units is enabled:
    
    • Surface Size (cm): 0-500
      Set the size of the UV space in world units
    • Height Depth (cm): 0-10
      Set the distance represented by the height map. If the height map represents a small distance, then a large difference in height map values can have a small impact on the normal angle. If the height map represents a large distance, then a small difference in height map values can represent a large angle on the normal map.
  • If Use World Units is disabled:
    • Intensity: 0-3
      Adjust the steepness of the normal angles
• Combine Bottom Normal: 0-1
  Add the existing normal map to the results of this filter. 

Mask

• Custom Mask: toggle
  Enable or disable the use of a custom mask. If enabled the following parameters appear:
  • Mask: image/brush
    Select an image to use as a mask or use the brush to paint a custom mask directly in the 2D view
  • Custom Mask - Blur: 0-1
    Blur the mask
    
  • Custom Mask - Invert: toggle
    Invert the mask