Place your own LUT such as .cube, .itx, .lut, etc..into following folder:
Program Files/Adobe/Adobe SpeedGrade CC/Lumetri/LUTs
Placed LUT will be added SpeedGrae “timline” “Calibration” tab.
You can also easily find LUTs for Black Magic Cinema Camera through online. If you’re having trouble with green tone image, those LUTs can be used for good starting point of your grading.