Ruined Portals now have following Methods:

• setMossinessProbability(Float probability)
  • null for default Settings or 0.0 to 1.0
• setGiantPortalProbability(Float probability)
  • null for default Settings or 0.0 to 1.0
• setAirPocket(Boolean airPocket)
  • null for default Settings or true/false
• setOvergrown(Boolean overgrown)
  • null for default Settings or true/false
• setReplaceWithBlackstone(Boolean replaceWithBlackstone)
  • null for default Settings or true/false
• setVines(Boolean vines)
  • null for default Settings or true/false
    

By default all those settings are null and the Portals will have vanilla behaviour.