polyNormal

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Controls the normal orientation of the object. The normal computation is done according to one of five modes:

• reverse
• propagate
• conform
  These 3 modes are being phased out and remain for backwards compatability only.
• ReverseAndCut : reverse normals on input faces and cut into new shells. Since new vertices and edges need to be added to create the new shells, this operation will result in vertex and edge index re-numbering thus resulting in a change in polygonal topology.
• ReverseAndPropagate : reverse normals on input faces and propagate this direction so that all faces in the shell are now oriented in the new (reversed) direction.

polyTweak, polyTweakUV, polyMapCut, polyMapDel, polyMapSew, polyMoveUV, polyMoveFacetUV, polyFlipEdge, polySmoothFace, polySmooth, polyReduce, polyDelFacet, polyDelVertex, polyMergeFace, polySplit, polyAppendVertex, polySubdFace, polyCollapseF, polyCloseBorder, polyAppend, polyCollapseEdge, polyTriangulate, polyDelEdge, polyMergeEdge, polyColorPerVertex, polyNormalPerVertex, deleteUVSet, polySeparate

normalMode, userNormalMode

Long name (short name)	Type	Default	Flags
normalMode (nm)	enum	0
Normal mode : 0=reverse, 1=propagate, 2=conform, 3=reverseAndCut, 4=reverseAndPropagate
userNormalMode (unm)	bool	true
Determines if user normals needs to be reversed as well.