ARRI and RED DRTs in OCIO

@Derek @ysysimon I replicated what you did on this thread and edited further based on what I understood, but I found out the result is slightly bland compared to the way of implementing LUT file directly. Please tell me what could I have possibly done wrong?
Discussions - Using ACES VFX

  - !<ColorSpace>
    name: TestLUT
    aliases: [test_lut]
    family: Input/ARRI
    equalitygroup: ""
    bitdepth: 32f
    isdata: false
    encoding: scene-linear
    from_scene_reference: !<GroupTransform>
      children:
        - !<MatrixTransform> {matrix: [0.695452, 0.140679, 0.163869, 0.000000, 0.044795, 0.859671, 0.095534, 0.000000, -0.005526, 0.004025, 1.001501, 0.000000, 0.000000, 0.000000, 0.000000, 1.000000]}
        - !<MatrixTransform> {matrix: [1.3317489220, -0.1910418312, -0.1407070910, 0.0000000000, -0.0010810260, 0.9928187215, 0.0082623045, 0.0000000000, 0.0006639882, 0.0007515137, 0.9985844981, 0.0000000000, 0.0000000000, 0.0000000000, 0.0000000000, 1.0000000000]}
        - !<LogCameraTransform> {log_side_slope: 0.0647954196341293, log_side_offset: -0.295908392682586, lin_side_slope: 2231.82630906769, lin_side_offset: 64, lin_side_break: -0.0180569961199113, direction: forward}
        - !<FileTransform> {src: ARRI_LogC4-to-Gamma24_Rec709-D65_v1-33.cube, interpolation: best}
        - !<RangeTransform> {min_in_value: 0., min_out_value: 0., max_in_value: 1., max_out_value: 1.}