Normal vectors
 
 
 

The calculation of the tangent space vectors in Mudbox is as follows:

  1. Calculating per vertex tangent and binormal vectors for each face.
  2. Smooth values for common vertices. Each vertex will get a Tangent Normal Binormal index based on the selection in the Index Source combo box in the following way:
    NoteVertices with the same index use the same vectors, so their tangent binormal and normal vectors are added together and normalized.
  3. Orthogonalization based on the corresponding options selected in the Texture Extraction window.
  4. Calculation of the cross products. If you selected an option in the user interface for this, then the previously calculated vector will be replaced by the cross product of the other two vectors.
  5. Switch tangent with binormal if you select the Switch Tangent With Binormal option.
  6. Invert vectors marked at the Flip part of the user interface.