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.