I am having a problem with the adding feature classes to the terrain in my python code. I am trying to go from las files to a terrain. The code I am using is listed below: The LAS_FD is the Las feature dataset
arcpy.env.workspace = LAS_FD
fcList = arcpy.ListFeatureClasses()
params = "fcList shape mass points <None> 0 48 <none> false <none> <none>"
print "Adding feature classes to the terrain"
arcpy.AddFeatureClassToTerrain_3d (in_terrain, params)
Thanks in advance for any help!