A 4 by 4 matrix applied to a texture coordinate.
  M11 | Gets the element in the first row, first column. | 
  M12 | Gets the element in the first row, second column. | 
  M13 | Gets the element in the first row, third column. | 
  M14 | Gets the element in the first row, fourth column. | 
  M21 | Gets the element in the second row, first column. | 
  M22 | Gets the element in the second row, second column. | 
  M23 | Gets the element in the second row, third column. | 
  M24 | Gets the element in the second row, fourth column. | 
  M31 | Gets the element in the third row, first column. | 
  M32 | Gets the element in the third row, second column. | 
  M33 | Gets the element in the third row, third column. | 
  M34 | Gets the element in the third row, fourth column. | 
  M41 | Gets the element in the fourth row, first column. | 
  M42 | Gets the element in the fourth row, second column. | 
  M43 | Gets the element in the fourth row, third column. | 
  M44 | Gets the element in the fourth row, fourth column. | 





