"Option 2" is enabled with macros:
IDCC_LMCS_INVLUT	1
IDCC_LMCS_INVLUT_EXT_CLIP 0

"Option 3" (on top of option 2) is enabled with macros:
IDCC_LMCS_INVLUT	1
IDCC_LMCS_INVLUT_EXT_CLIP 1