This interstitial code adds the subgrid clouds to the resolved-scale clouds if there is no resolved-scale clouds in that particular grid box. It can also specify a cloud fraction for resolved-scale clouds as is done currently when using MYNN-EDMF. For clouds coming from the convection schemes (in this case only used by GF scheme), two cloud fraction options are available: Xu-Randall (XR1996) or Chaboureau and Bechtold (CB2005), chosen by the switch "conv_cf_opt" = 0: CB2005, 1: XR1996.