Parameters are accessed with C4DAtom::GetParameter()/ C4DAtom::SetParameter(). See page_maxonapi_getting_started_foundations_cinema_parameters.
Parameter: MDATA_SCULPTBRUSH_SETTINGS_FIXEDPLANE
MDATA_SCULPTBRUSH_SETTINGS_FIXEDPLANE
Parameter: MDATA_SCULPTBRUSH_SETTINGS_FIXEDPLANE_CUSTOM_HIDEONSTROKE
MDATA_SCULPTBRUSH_SETTINGS_FIXEDPLANE_CUSTOM_HIDEONSTROKE
Parameter: MDATA_SCULPTBRUSH_SETTINGS_FIXEDPLANE_CUSTOM_SIZE
MDATA_SCULPTBRUSH_SETTINGS_FIXEDPLANE_CUSTOM_SIZE
Parameter: MDATA_SCULPTBRUSH_SETTINGS_FIXEDPLANE_DEPTH
MDATA_SCULPTBRUSH_SETTINGS_FIXEDPLANE_DEPTH
Parameter: Smooth
MDATA_SCULPTBRUSH_FLATTEN_SMOOTH