{
            "type":"minecraft:add",
            "argument1":"terralith:dune/dune_height",
            "argument2":{
               "type":"minecraft:add",
               "argument1":


               {
                  "type":"add",
               "argument1":{
                  "type":"minecraft:y_clamped_gradient",
                  "from_y":40,
                  "to_y":57,
                  "from_value":1,
                  "to_value":0
               },

               "argument2":

               {
                  "type":"minecraft:y_clamped_gradient",
                  "from_y":57,
                  "to_y":320,
                  "from_value":0,
                  "to_value":-5
               }

            },
               "argument2":
               {
                  "type":"flat_cache",
                  "argument":{
                     "type":"cache_2d",
                     "argument":
               {
                  "type":"add",
               "argument1":

               {"type":"mul","argument1":1.0,"argument2":"terralith:dune/size_spline"},
               "argument2":-1.75
            }}}


            }
         
   }