ReProject3D v1.1

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def exrCam():  
    def getMetadataMatrix(meta_list):
      m = nuke.math.Matrix4()
      try: 
          for i in range(0,16):
              m[i] = meta_list[i]   
      except:
          m.makeIdentity()
      return m
 
    n=nuke.thisNode()
 
    hold=int(n['frameHold'].value())
 
    camMatrix = getMetadataMatrix(n.metadata('exr/worldToCamera',hold))
 
    flipZ=nuke.math.Matrix4()
    flipZ.makeIdentity()
    flipZ.scale(1,1,-1)
 
    transposedMatrix = nuke.math.Matrix4(camMatrix)
    transposedMatrix.transpose()
    transposedMatrix=transposedMatrix*flipZ
    invMatrix=transposedMatrix.inverse()    
 
    n['matrix'].setValue(invMatrix[0],0)
    n['matrix'].setValue(invMatrix[1],1)
    n['matrix'].setValue(invMatrix[2],2)
    n['matrix'].setValue(invMatrix[3],3)
    n['matrix'].setValue(invMatrix[4],4)
    n['matrix'].setValue(invMatrix[5],5)
    n['matrix'].setValue(invMatrix[6],6)
    n['matrix'].setValue(invMatrix[7],7)
    n['matrix'].setValue(invMatrix[8],8)
    n['matrix'].setValue(invMatrix[9],9)
    n['matrix'].setValue(invMatrix[10],10)
    n['matrix'].setValue(invMatrix[11],11)
    n['matrix'].setValue(invMatrix[12],12)
    n['matrix'].setValue(invMatrix[13],13)
    n['matrix'].setValue(invMatrix[14],14)
    n['matrix'].setValue(invMatrix[15],15)
    return